Macos Update Not Installing


After the MacOS 10.14.4 Update, softwareupdate also shows me the following as a further update/ download: Command Line Tools (macOS Mojave version 10.14) for Xcode 10.2. Now if I need it, I am fine installing it. I am wondering why I need it though, since I don't have Xcode installed, and am not developing software in any sense.

Users may encounter failures to download and install macOS updates when Apple servers are overloaded, therefore sometimes simply waiting a bit can be helpful. This is particularly relevant if the software update you are trying to install is brand new, like a major system software release (this happened with Big Sur for example). Hi all, I got my new macbook 2 weeks back and I totally fell in love with this baby. Up till now I haven't faced any problems but recently I tried to install Mac OS updates- the updates download successfully- asks for a restart(I do as it says) and then while installing updates I hangs on at about 15% where is says configuring installation. But this time, it seems that the Catalina update installation did not check the available storage space of the Mac disk before the installation. Then many mac users reported that they can’t install the macOS Catalina because of the storage issue, and some of their macs stuck in a loop restarting and installing macOS update. This article will. Restarting the affected system will make the update visible again—but that may or may not help; if the next attempt to install 11.1 generates the same erroneous 11.0.1 request, the problem. Question: Q: Unable to install macOS Catalina 10.15.7 Update Software Update prompts me that an update is available for my Mac. Specifically, the 10.15.7 update and tells me a restart is required.

Updating your MacBook or iMac should be free of headaches and drama. Apple even coined a marketing phrase “it just works!” But recently, a lot of readers and Mac users are finding the opposite–it just doesn’t work! Several users have recently had issues updating their MacBook with the latest version of macOS. Unfortunately, this appears to be a fairly common problem for some when updating to the latest macOS High Sierra update.

The update gets stuck with a message “mac os could not be installed on your computer an error occurred installing macOS.” Some folks report seeing this message as well “the path /System/Installation/Packages/OSInstall.mpkg appears to be missing or damaged.”

Then your Mac prompts you to quit the installer and restart your computer. Well, Apple, whatever happened to it just works???


  • 1 Quick Tips
  • 2 Getting macOS could not be installed on your computer?
  • 3 How-To Fix macOS could not be installed issue
  • 6 Reader Tips

Quick Tips

  • Check that your Mac’s Date&Time are on Set Automatically
  • Reset your Mac’s NVRAM or PRAM
  • Free up some internal hard drive storage
  • Restart in Safe Mode and run Disk Utility’s First Aid
  • Try Recovery Mode
  • Use Terminal to identify and remove non-Apple KEXTs
  • Restart in Single User Mode to remove problematic files


Getting macOS could not be installed on your computer?

If you are experiencing this issue with your update, here are a few tips that you can use to address this issue. Before proceeding with the steps below, we suggest that you ensure your Mac’s clock is correct. If your Mac’s Date&Time do not match your current timezone or date, macOS often won’t install. Go to System Preferences > Date & Time. Apple prefers if you choose the option to Set Automatically.

Next, let’s try out the basic NVRAM reset (or PRAM for older Macs) on your computer.

Follow these steps if you are not sure about how to do the NVRAM reset

  1. Shut down your Mac
  2. Turn it on and immediately press and hold these four keys together: Option, Command, P, and R
  3. Release the keys after about 20 seconds, during which your Mac might appear to restart
  4. Open System Preferences and check (and adjust, if necessary) any settings that reset, like volume, display resolution, startup disk selection, or time zone

Check Storage

The other thing is to make sure that your MacBook/Mac has enough space available to complete the update. If you are running low on space, Apple provides some guidelines that can help you recover some space on your Mac.

Beyond the Basics

Now, that we have taken care of the basics, we suggest that you try each of the processes below until your macOS install problem is fixed. We arranged the how-to-fix steps in three separate categories.

The first of the troubleshooting steps walk you through Safe mode options and then we suggest the Recovery mode. The last of the options shows you how to remove third-party KEXT files using simple terminal commands and then try the install process.

How-To Fix macOS could not be installed issue

Fixing the Install issue using Safe Mode on your Macbook

  • One of the best practices around updating is to make sure that you have taken a backup of the system before doing any troubleshooting. Better Safe than Sorry. We are assuming that you have already backed up your machine before you proceed with any of the steps below
  • The first thing to try is to get your Mac/MacBook into Safe mode. When you hold the ‘Shift’ key during startup, your computer will launch into Safe mode
  • Safe mode essentially forces the initiated process to ignore all third party launch daemons and startup items. Once you are in the Safe mode, the next course of action is to get into Disk Utility. Once your MacBook has entered safe mode, you will see it indicated in the top right-hand corner of your screen
  • Log in using your credentials and then go to your macOS Utilities folder. Here you will need to start up the Disk Utility Program. Once in the program, Click First Aid on the top and choose the volume (Your main HDD) and start the repair process
  • Once the Repair has completed, you will be notified of the status. At this point, you would want to rerun the macOS Update program and see if it works for you without giving you the error message

If you tried the steps above in Safe mode and did not find success, the next course of action is to try the Recovery mode.

Fixing macOS Install Problem in Recovery Mode

  • To get to recovery mode on your Mac or MacBook, you will need to press and hold Command + R keys together when booting up your computer
  • Once you are in the Recovery mode, click on the Apple logo on the top left corner of the screen and make sure that your startup disk is pointing to the Mac Boot disk
  • Now find the macOS update program and run the update

Sometimes, when you are facing install/upgrade issues, a workaround that works for many users is to create an external bootable installer and try to run the install program using it. Apple provides a detailed white paper on this process. You can create the bootable installer on a USB and then try it to update the macOS.

Removing Third Party KEXT Files

If you are still reading and have already tried the series of fixes in both Safe mode and Recovery mode to no avail, you may have to roll up your sleeves and do a little more digging into the root cause of the issue. Sometimes it’s the third party KEXT extensions that cause a lot of heartache during update/install of macOS.

These KEXT Files get added to your Mac/MacBook when you are using third-party devices. If you are not sure about it, your best bet is to look and see what third-party extensions are currently there on your machine.

To do so, Open up terminal from your utilities and type in the following to see the non-Apple KEXTs.

Kextstat grep –v

This command should show you all the third party extensions. Now you can remove them one by one or remove the one that you think may be the suspect. Using terminal, you can unload the kext my using the following command.

sudo kextunload /System/Library/Extensions/NAMEOFTHEKEXT.kext

Here ‘NAMEOFTHEKEXT’ needs to be replaced with the appropriate suspect KEXT file that you found above. Once you have unloaded the KEXT, you can go back and check to make sure that it has indeed been removed by using the kextstat command.

Once you have removed all the third party KEXT files and have made sure that you have enough space on your machine for the macOS update, please try and relaunch the install process.

Problems? Try Single User Mode

If your install process is failing because of a particular problematic file, you can also try to log in using the single user mode and delete that specific file and then try resuming the install. Sometimes you find these problematic ones off files in the Installer log files. To access these log files, open up the Console app in utilities and click on ‘/var/log’ on the left-hand column and then choose ‘instal.log’in the next column.

We are hoping that you were able to fix the macOS Install issue using some of these tips. If you have tried everything without any success, your best bet is to reach out to Apple Support folks so that they can help out. Please let us know how your install worked by using the comments below.

Reader Tips

  • Try restarting in recovery mode and install macOS High Sierra or Sierra from a bootable USB drive disk. If necessary, reformat your SSD to Mac OS Extended (Journaled), not APFS
  • Try setting up another admin user account to see if the same problem continues
  • Boot up your Mac using Cmd + R to access the recovery partition. Immediately, go the Apple menu choose Startup Disk. Select your HD. Unlocked it if necessary by entering your admin password. Reboot and see if it starts up normally
  • Update your system’s clock by using Terminal. Open Applications > Utilities >Terminal and type the command date. If the date listed is incorrect, type this command ntpdate -u “” then press return. If you live outside of the Americas, type in Apple’s time server nearest you, such as or inside the parenthesis
  • I created an ISO image of macOS High Sierra on a USB and installation was a breeze after that
  • Shut down your Mac and wait 30 seconds. After 30 seconds, press the power button and immediately hold down Command + R and keep pressing these keys until the apple logo appears. You should see a screen asking you to choose a language, select your language of choice, and navigate to your macOS Utilities. Check the WiFi button at the top right to make sure you’re connected to the internet. Then select reinstall the latest version of macOS, click continue, agree and allow it to download and restart on its own (just leave the Mac alone–really!) After macOS reinstalls, it should restart and end up at the login screen
  • I booted up while holding the Option key and chose my regular MacinstoshHD (not an update volume). Then I booted normally (not with safe mode) and tried again to reinstall the update. Took several reboots but in the end, it worked!
  • Oftentimes, this error means your Mac is trying to boot from a different HD partition, sometimes even the recovery partition. To fix it, restart in startup manager (holding option key) and select your regular HD to reboot from. Once successful, go to System Preferences > Startup Disk > Select your normal HD startup. That should fix the problem

Obsessed with tech since the early arrival of A/UX on Apple, Sudz (SK) is responsible for the editorial direction of AppleToolBox. He is based out of Los Angeles, CA.

Sudz specializes in covering all things macOS, having reviewed dozens of OS X and macOS developments over the years.

In a former life, Sudz worked helping Fortune 100 companies with their technology and business transformation aspirations.

Today Apple released macOS Big Sur 11.0 -10.16 (20A4299v) Beta 1 to Developers.

UPDATE 6/23/20 – Keep an eye on my Big Sur Need to Know changes article. I will be constantly updating it as new info comes in.

MacOS Big Sur 11.0 -10.16 (20A4299v) Beta 1 was released today on June 22nd, 2020 at 2:00 CST right after the keynote.

Update Xcode Windows

Mac Update Not Installing 10.15.6

macOS Big Sur 11.0 Patch Notes

Just like last year, the 11.0 beta 1 patch notes list is huge! The amount of detail is just what MacAdmins are looking for! Let me give you some stats from the 11.0 Beta 1 Patch notes document.

  • 1 Important Known Issue
  • 4 Deprecations
  • 11 New Features
  • 1 Resolved issues
  • 60 Known Issues – Core OS, Apps, Xcode & SwiftUI

Public Link (non developer) =

MacAdmin Patch Notes of Interest

  • Updating to macOS Big Sur 11 beta from previous versions of macOS might take significantly longer than expected. Data loss could occur if the update is interrupted. (59101197)
  • If macOS Big Sur 11 beta is installed into the same APFS container as previous versions of macOS, system software updates can no longer be installed on the previous versions of macOS. (64411484)
  • Installing a new kernel extension requires signing in as an Admin user. During kernel extension development, every time a kernel extension is changed, it must be signed and notarized. In both cases, your Mac must be restarted to load the extension. (55068348)
  • If you updated to macOS Big Sur 11 beta from a previous version of macOS, Software Update might show “Unable to check for updates – Failed to download the documentation for the minor update. Please try again later”. (63158434)Workaround Below
  • Kernel extensions using certain deprecated KPIs no longer load. Refer to the support page. While macOS Big Sur remains in development, you can temporarily disable System Integrity Protection to allow these deprecated extensions to load. (55068348)
  • macOS Big Sur 11 beta improves system security by requiring an administrator password when a certificate trust settings change is made in the admin trust domain. Running as the root user alone is no longer sufficient to modify certificate trust. User trust domain settings continue to require confirmation by entering the password for the user’s account.

macOS Big Sur 11.0 Installer Info


Link –

Size = 9.57GB

Product ID = 001-18401-003

Requirements – ?

T2 BridgeOS Update

T2 BridgeOS was updated along with the 11.0 upgrade

Size = 440.1 MB

Product ID = 001-18400

BridgeOS Update Version = 18.16.10310.5.15

New Software Update Catalog URL

Report bugs NOW!

Now that macOS Big Sur 11.0 Beta is live, start testing as soon as you can! You will want to submit any bugs that you find into Apple ASAP. If you get bugs in quickly, they could be fixed in the current beta cycle instead of waiting until after the public release. If not, you could be waiting months before the fix is put into a dot release combo update.

macOS Big Sur 11.0 (20A4299v) Beta 1 Release Notes

I always post the full patch notes to this page to document them for you. The reason behind that is that Apple will usually just replace over the old patch notes so you are then unable to see what was fixed in the previous release.


The macOS 11 SDK provides support to develop apps for Macs running macOS Big Sur 11. The SDK comes bundled with Xcode 12 beta. For information on the compatibility requirements for Xcode 12 beta, see Xcode 12 Beta Release Notes.


Xcode Update Won't Install

Known Issues


Updating to macOS Big Sur 11 beta from previous versions of macOS might take significantly longer than expected. Data loss could occur if the update is interrupted. (59101197)

Third-Party Apps

Known Issues

  • CMake might not run, install, or might generate invalid outputs. (62905973)Workaround: Update to CMake 3.18rc1.


Macos Update Not Installing

Known Issues

  • VoiceOver might be unavailable at certain times while installing macOS Big Sur 11 beta. (63025357)

App Store

New Features

  • SKStoreProductViewController and SKProductStorePromotionController APIs are now available for both macOS and Mac Catalyst apps. (56300909)


  • See AppKit Release Notes for macOS Big Sur 11.

Auto Unlock

Known Issues

  • You might be unable to set up Auto Unlock. (64120075)


Known Issues

  • If you click the Directions button on a calendar notification, Maps might not launch as expected. (63697152)
  • It isn’t possible to edit Calendar widgets. (63984003)
  • Accounts might not be visible in Preferences. (64117985)


Known Issues

  • Continuity Handoff isn’t currently available in macOS Big Sur 11 beta. (64140413)

Core ML

Known Issues

  • When setting isSynchronizationEnabled to true on a MLModelCollection, the initial download may take longer than expected to complete. The collection then becomes available. (64131243)


  • The default initializer on the auto-generated model interface has been deprecated in favor of init(configuration:). Please use init(configuration:) or the newly introduced .load() method and handle model load errors as appropriate. (64432588)

Desktop Picture

Known Issues

  • If the desktop picture was never changed from the default macOS Catalina 10.15 image, it will persist after updating to macOS Big Sur 11 beta, even though the new default desktop picture is displayed in Desktop and Screen Saver preferences. (64390185)

Installer and Software Update

Known Issues

  • If you updated to macOS Big Sur 11 beta from a previous version of macOS, Software Update might show “Unable to check for updates – Failed to download the documentation for the minor update. Please try again later”. (63158434)Workaround:
    1. Start up from macOS Recovery.
    2. If your data volume is encrypted, use Disk Utility to mount it.
    3. In Terminal type rm -rf '/Volumes/Macintosh HD - Data/private/var/folders/zz/zyxvpxvq6csfxvn_n00000y800007k'.
    4. Restart your Mac.
  • You might need to adjust Energy Saver settings so your Mac doesn’t go to sleep while preparing to install macOS Big Sur 11 beta. (63166401)
  • APFS containers with non-default allocation block sizes aren’t currently supported for installation. (64312561)
  • Update iMac Pro to macOS High Sierra 10.13.6 or later before installing macOS Big Sur 11 beta. (64314272)
  • Installation might pause on Macs that don’t have input devices connected. (64348347)Workaround: Connect an input device and dismiss the alerts to continue installation.
  • You might be unable to install macOS Big Sur 11 beta onto additional volumes. (63677460, 64445236)Workaround: Create a bootable installer using the createinstallmedia command.
  • Software Update might unexpectedly indicate updates for your Mac are being managed by, instead of indicating your Mac is enrolled in the Apple Beta Software Program. This doesn’t impact your ability to update macOS Big Sur 11 beta. (64407436)
  • If macOS Big Sur 11 beta is installed into the same APFS container as previous versions of macOS, system software updates can no longer be installed on the previous versions of macOS. (64411484)
  • Installation on Core Storage Fusion volumes with FileVault encryption enabled isn’t currently supported. (64472080)


New Features

  • The kern.argmax limit has been increased, allowing programs to receive longer argument lists. (48661669)
  • Darwin kevent now allows non-parent processes to register for NOTE_EXITSTATUS, which delivers the same values as the wait() family of functions in the event data. Refer to the wait4() man page for more information. This event is subject to the following security checks:
    • The requesting process is allowed to send signals by sandbox restrictions.
    • The requesting process and the target process are running as the same user or the requesting process has root privileges. (58134463)

Known Issues

  • Installing a new kernel extension requires signing in as an Admin user. During kernel extension development, every time a kernel extension is changed, it must be signed and notarized. In both cases, your Mac must be restarted to load the extension. (55068348)
  • Remote panic dumps aren’t currently available. (57915324)
  • New in macOS Big Sur 11 beta, the system ships with a built-in dynamic linker cache of all system-provided libraries. As part of this change, copies of dynamic libraries are no longer present on the filesystem. Code that attempts to check for dynamic library presence by looking for a file at a path or enumerating a directory will fail. Instead, check for library presence by attempting to dlopen() the path, which will correctly check for the library in the cache. (62986286)
  • kmutil install might fail to build a development kextcache. (63772702)Workaround: Copy the release .elides to the locations of the development .elides:sudo cp /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.development.elidessudo cp /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.kasan.elides sudo cp /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/BootKernelExtensions.kc.debug.elidessudo cp /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.development.elidessudo cp /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.kasan.elidessudo cp /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.elides /path/to/livemount/System/Library/KernelCollections/SystemKernelExtensions.kc.debug.elides
  • Use only absolute paths with the --volume-root option of kmutil, and don’t use a trailing /. (63773848)
  • After removing a DriverKit extension, restart your Mac to complete uninstallation. (63995046)
  • Adhoc signed kernel extensions are displayed with a developer name of unknown in update dialogs and in Security preferences. (64215260)
  • Symbols exported by both xnu and Apple kernel extensions will change. Recompile your kernel extension with each update to macOS Big Sur 11 beta to ensure compatibility. (64262563)
  • Moving a kernel extension bundle out of /Library/Extensions might not completely uninstall it. (64331929)Workaround:
    1. Remove the extension from /Library/Extensions.
    2. Boot to macOS Recovery.
    3. Run Terminal.
    4. Enter the command kmutil invoke-panic-medic.
    5. Restart your Mac.
    6. Follow the prompt to open System Preferences and navigate to Security & Privacy.
    7. Follow the prompt to restart.
  • An unexpected System Extension Updated alert for third-party kernel extensions which are included in macOS might appear. These include: Accusys, Inc., ATTO Technology, Inc., Areca Technology Corporation, CalDigit, Inc., HighPoint Technologies, Inc., Promise Technology Mobile Apps, and Other World Computing. (64337113)


Macos Update Not Installing
  • Kernel extensions using certain deprecated KPIs no longer load. Refer to the support page. While macOS Big Sur remains in development, you can temporarily disable System Integrity Protection to allow these deprecated extensions to load. (55068348)


Known Issues

  • Certain languages might exhibit clipped or misaligned layout. (63105445)
  • Certain languages might display unlocalized text. (63105674, 64040564, 64045718)
  • Some keyboard shortcuts might not work when running macOS Big Sur 11 beta in a language other than English. (63834383)


Known Issues

  • Widgets have access to location information even if the NSWidgetWantsLocation key isn’t in their Info.plist. (61953645)
  • In Swift, the authorizationStatus() property of CLLocationManager is incorrectly exposed as a method instead of a property. (62853845)


New Features

  • New APIs are available for using os_log from Swift as part of the os framework:
    • A new type Logger can be instantiated using a subsystem and category and provides methods for logging at different levels (debug(_:), error(_:), fault(_:)).
    • The Logger APIs support specifying most formatting and privacy options supported by legacy os_log APIs.
    • The new APIs provide significant performance improvements over the legacy APIs.
    • You can now pass Swift string interpolation to the os_log function.
    Note: The new APIs can’t be back deployed; however, the existing os_log API remains available for back deployment. (22539144)

Macos Xcode Command Line Tools

Mac Catalyst

Known Issues

Macos Update Not Installing Windows 7

  • Content Extensions require a temporary workaround. (57442394)Workaround: Add the following key/value pair to the NSExtension dictionary in the Info.plist: 'NSExtensionContainingViewControllerClass' = '_UNNotificationContentExtensionViewController'.
  • The new PHPickerViewController API currently produces unexpected results. (63631906)


Known Issues

  • If Messages is launched immediately after logging into iCloud, a login window might be displayed unexpectedly. (56309057)Workaround: Relaunch Messages after a few minutes or try restarting your Mac.
  • You might be unable to type in the photo picker search field when attaching a photo. (60011306)Workaround: Click the search field, press the tab key, then click the search field again.
  • You might receive an alert that indicates the maximum number of pinned conversations has been reached. (62919406)Workaround: Pin the conversation using drag and drop instead of using a swipe action or quick action with Haptic Touch.
  • Keyboard navigation to move focus between controls isn’t currently available. (63987810)
  • Messages Preferences are inaccessible until at least one message has been sent or received. (64122975)
  • Autocomplete fields and conversation titles aren’t visible while Messages is in full-screen mode. (64134303)
  • Message outlines might be missing when printing or exporting a conversation as a PDF. (64181169)
  • The first and last name fields in Messages Preferences might be misaligned. (64346872)Workaround: Set up your name in Messages Preferences by following the placeholder text then close and reopen Messages Preferences.


Known Issues

  • The logs property isn’t currently available from Swift while using Shader Validation. (64055248)

Migration Assistant

Known Issues

  • You might need to reset the password for a Standard account after migration, if the previous password doesn’t work. (63878129)Workaround: Log into an Admin account and change the Standard account’s password in the Users & Groups system preference.


Known Issues

  • Many elements of the user interface are currently missing when running Motion on macOS Big Sur 11 beta. (62531765)


Known Issues

  • Music might quit unexpectedly while using the search field. (64183834)


New Features

  • Experimental HTTP/3 support can be enabled in Safari via Experimental Features in the Developer menu, and enabled system-wide using the Terminal command defaults write -g CFNetworkHTTP3Override -int 3. (62969220)

Known Issues

  • HTTP/3 Draft 29 isn’t yet supported. (63524866)

Phone and FaceTime

Known Issues

  • Regular and emergency Wi-Fi calling using iPadOS 14 beta, macOS Big Sur 11 beta, and watchOS 7 beta isn’t currently available for T-Mobile USA customers. (63078572)


Known Issues

  • Importing Quartz or PDFKit frameworks in the macOS SDK might result in an errors such as “Umbrella for module ‘Quartz.PDFKit’ already covers this directory”. (63886438)

Safari and Webkit

New Features

  • Support for Web Extensions is now available. Existing Chrome and Firefox extensions can be converted for Safari using xcrun safari-web-extension-converter and distributed through the App Store for use in Safari 14. (55707949)
  • Webpage Translation is now available in the U.S. and Canada. Supported languages include English, Spanish, Simplified Chinese, French, German, Russian, and Brazilian Portuguese. Safari will automatically detect if translation is available based on your Preferred Languages list. (64437861)

Known Issues

  • Safari might quit unexpectedly when opening the Start Page if Frequently Visited Sites are visible as thumbnails. (63945984)Workaround: Make the window wider, hide the sidebar, or Control-click on Frequently Visited Sites and choose View as Icons.
Macos Update Not Installing


New Features

  • macOS Big Sur 11 beta improves system security by requiring an administrator password when a certificate trust settings change is made in the admin trust domain. Running as the root user alone is no longer sufficient to modify certificate trust. User trust domain settings continue to require confirmation by entering the password for the user’s account. This change may affect you if one of the following is true:
    • You have written scripts which call /usr/bin/security add-trusted-cert -d ... as root.
    • Your process runs as root and calls the SecTrustSettingsSetTrustSettings function to trust a certificate.
  • Workflows that add trust settings in the admin trust domain, such as for an enterprise root certificate, may require modification if the user can’t authenticate as an administrator at the time settings are changed. (21855995)Workaround: Use Apple Configurator 2 to create and install a configuration profile containing your root certificate.


Known Issues

  • When quickly typing a search query in Spotlight, the result from a previous search might appear, then pressing return may create a wrong launch shortcut for subsequent queries. (64428836)Workaround: Type your query and click the desired result from the list that appears.
  • If you can’t find an application using Spotlight, launch the application at least once using Finder. (64463806)


Known Issues

  • Disclosure groups in Forms might produce unexpected results. (64079102)
  • Nested disclosure groups generated by OutlineGroup might produce unexpected results. (64097731)
  • The SceneStorage property wrapper isn’t yet supported. (64414712)
  • A label used with a symbol image might appear misaligned. (60193698)


Known Issues

  • Driver extensions might not launch on-demand after installation. (51229724)Workaround: Disable System Integrity Protection, then launch Terminal and execute the following command before approving the newly installed driver: sudo touch /Library/DriverExtensions.

Touch ID

Known Issues

  • Touch ID might become unexpectedly disabled on Macs with a T2 Security Chip after installing multiple operating systems. (62608379)Workaround: Reset the SMC of your Mac.


New Features

  • hv_vcpu_run_until(_:_:) now supports the deadline HV_DEADLINE_FOREVER. (57025216)
  • The new hv_vcpu_enable_managed_msr(_:_:_:) and hv_vcpu_set_msr_access(_:_:_:) enable direct MSR access from a guest. (50291076)


  • The function hv_vcpu_run(_:) is deprecated.


Known Issues

  • The NSSecureCoding implementation of VNRecognizedPointsObservation currently causes initWithCoder: to fail. (63681919)

Installing Xcode On Mac


  • The VNIdentifiedPointsObservation class is deprecated. Use VNRecognizedPointsObservation instances instead. (63690311)

Macos Xcode Install

Xcode Previews

Resolved Issues

  • Rebuilding against the iOS 14, macOS 11, watchOS 7, and tvOS 14 SDKs changes uses of GeometryReader to reliably top-leading align the views inside the GeometryReader. This was the previous behavior, except when it wasn’t possible to detect a single static view inside the GeometryReader. (59722992) (FB7597816)

Big Sur 11.0 Beta 1

Questions or issues ? Contact Me

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Here’s how to update OS on Mac at any time:

  1. Go to System Preferences ➙ Software Update

  2. If there’s a MacBook update available, click Update Now

In 95% of cases, that’s all you need to do to update Mac software. However, very rarely, you might also see an error saying that the macOS installation couldn’t be completed or macOS update could not be installed or something similar. And there are a few ways to fix that.

What To Do To Get A MacBook Update

When you start analyzing what gets your macOS Big Sur install stuck, the first thing to pay attention to is the version of your Mac. As new and more feature-rich macOS updates appear, they stop supporting older Macs that are simply not powerful enough.

Here are all the Mac models supported by macOS Big Sur:

  • iMac (2014 or newer)
  • iMac Pro (2017 or newer)
  • Mac Pro (2013 or newer)
  • Mac Mini (2014 or newer)
  • MacBook (2015 or newer)
  • MacBook Air (2013 or newer)
  • MacBook Pro (2013 or newer)

If you compare macOS Big Sur 11 system requirements to those of macOS Catalina, you’ll notice the latest version moved a year to two years ahead. So make sure you have a compatible Mac before trying to install an update.

Well, it’s technically possible to run Big Sur on even older Macs by installing a third-party patch, but this is not officially supported by Apple and is not generally recommended for the security of your Mac. Since macOS support usually lasts for more than five years on various Macs, it might be time to actually upgrade your setup — it’s going to serve you well.

Running a brand new Mac? Here are some more things to consider to make sure you never have your macOS update stuck again.

Check the system status at Apple

Being one of the largest tech companies in the world, Apple’s systems are very stable and rarely have a glitch. Still, fate might have it that you’ve tried to update Mac software exactly at the time when a server was undergoing maintenance.

To check that the Apple software update download problem is not on their end:

  1. Go to

  2. Look for macOS Software Update and see if it’s green

Make sure your WiFi network is up

If the problem is not with Apple’s network, it might be with yours. Having a volatile WiFi connection could easily be the reason behind the macOS installation couldn’t be completed error. Luckily, it’s easy to test:

  1. Visit and click Go to see your current internet speed

  2. Try switching to the Ethernet connection, if that’s an option

  3. Contact your internet provider for support

In case you still see your Apple software update downloading, maybe you should just give it some more time (e.g. a couple hours) and wait.

Restart the update and your Mac

Macos Update Not Downloading

Let’s say that a few hours have passed and your update doesn’t seem to be moving anywhere — just cancel the process if it’s downloading or restart your Mac, by holding the power button, if you find macOS update stuck in installation.

Macos Update Not Installing After Restart

Update Mac software via App Store

It might come as a surprise for some, but Apple software update downloads are also available via Mac App Store. The only catch is that those updates have to be between major versions (e.g. Catalina ➙ Big Sur) and not minor releases of the same macOS.

So if you’re still running on Catalina:

  1. Open App Store on your Mac
  2. Type “Big Sur” in the search field
  3. Click Get

What if you need to get an incremental update? For example, macOS 10.15.3 to 10.15.4. You’re in luck, since Apple posts all its software versions on its website as well:

  1. Visit
  2. Click Download on any update that interests you
  3. Double-click the .dmg file from your Downloads folder to start the process

Set date and time to automatic

For one reason or another, you might have set your laptop to display custom time. Unfortunately, such a change might interfere with the MacBook update. To resolve this, try to set your time and date to be determined automatically:

  1. Go to System Preferences ➙ Date & Time

  2. Check the box next to “Set date and time automatically”

Go into Safe Mode

In some unique situations, you might have your Big Sur install stuck in black screen with no apparent ways out. Hold ⌘ + L to see the log of all activity and verify that no progress is being made. If not, it might be because some random processes are interfering with the proper installation, so you need to turn off your Mac and try to use it in Safe Mode.

Safe Mode starts up your Mac while blocking most of the external scripts, logs, or preferences, so nothing can get in the way of the system working properly.

To get your Mac in Safe Mode:

  1. Turn it off

  2. Press the power button while holding Shift

  3. Try to do the MacBook update once again

Reset NVRAM on your Mac

A more involved step beyond getting into Safe Mode is wiping your non-volatile random-access memory (NVRAM) clean. NVRAM is used to store certain settings and preferences while your Mac is turned off, which could make it difficult to update Mac software if a logging error has crept in somewhere there.

To wipe out NVRAM, restart your Mac and hold ⌘ + Option + P + R. Then try to initiate the update once again.

Reinstall macOS in Recovery Mode

Macos Update Not Installing

If neither Safe Mode nor resetting NVRAM helps, you could try the most definitive solution — reinstalling macOS in Recovery Mode.

Unlike Safe Mode, Recovery Mode basically forces you to get a brand new version of the operating system, preferably deleting all the contents of your hard drive in the process (using Disk Utility) to ensure that errors like “macOS could not be installed on your computer” don’t appear again in the future.

To reinstall macOS in Recovery Mode:

  1. Hold ⌘ + R when you’re restarting your Mac to get the same macOS. For the newest version possible, use ⌘ + Option + R.

  2. Choose Reinstall macOS out of the options given

  3. Click Continue

  4. Go through the installation process

Read more about how do I update my operating system on my Mac

Mac Update Not Downloading

How to restore your Mac from backup

For active Mac users who haven’t done much in the realm of optimization for a while, it’s strongly suggested to delete all their hard drive contents during the reinstallation of macOS using Disk Utility. Naturally, no one wants to lose years of their data — that’s why frequent backups are so essential.

Macbook Update Not Installing

Get Backup Pro is by far the most complete backup solution available today. You can easily do straightforward backups, and the app will compress the size of the archive by up to 60%, or you can do backups incrementally, only updating the files that have changed since the last backup. Other options include cloning your whole volume to a new external drive, so you can have your Mac with you anywhere on the go, and synchronizing folders between Macs to always have the same access to critical information.

What’s more, with Get Backup Pro you can schedule all the processes to never forget to update your backups and never lose more than a few days (or even hours) of data.

How to keep your Mac optimized

What if the macOS update could not be installed because your Mac is simply too old? Don’t despair, you can still get a lot of the perks of having a brand new macOS by properly optimizing your Mac.

Prepare Mac for new macOS

Too much clutter and system junk can cause macOS installation problems. Get CleanMyMac X to optimize Mac before upgrading.

CleanMyMac X will do wonders by instantly speeding up any setup you’ve got. It’s essentially a powerful system-wide booster that scans any areas of your Mac and finds ways to make them work better, whether that’s your browser, email client, RAM, or simply various useless logs sprinkled throughout.

To accelerate your Mac’s speed with CleanMyMac X:

  1. Open the app and go to Smart Scan

  2. Click Scan

  3. After the process is complete, select Review Details…

  4. Uncheck everything you don’t want to happen and hit Run

Repeat the process every few weeks and you’d be surprised how fast your Mac can be. And it doesn’t even have to be an old Mac — CleanMyMac X helps all!

How to monitor your Mac’s performance

So you’ve learned how to update OS on Mac, back it up with ease, and generally increase its speed. Now what? Basically, you need to make sure that none of those pesky errors ever happen again. In other words, you need a good monitoring solution.

iStat Menus is an all-in-one system data collector that’s always handily accessible from your menu bar. It shows your current CPU and GPU load, RAM availability, internal temperature, battery capacity, network bandwidth, and much more. The idea here is that you can spot your Mac underperforming in real time and fix the issue way before it becomes a problem. An ounce of prevention is worth a pound of cure, as they say.

Now you can see that even if you thought the macOS installation couldn’t be completed, with the right approach it’s still possible. In addition, it’s highly recommended that you create frequent backups with Get Backup Pro, optimize your Mac with CleanMyMac X, and monitor its state for any inconsistencies with iStat Menus.

Best of all, Get Backup Pro, CleanMyMac X, and iStat Menus are available to you at no cost whatsoever through a seven-day trial of Setapp, a platform with more than 200 indispensable apps that would make every task on your Mac a breeze. Sign up today for free and see for yourself!

Mac Update Not Installing 10.15.4

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