Macos Live Usb

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MacOS Big Sur 11.0.1 Final (20B29) is LIVE! MacOS Big Sur 11.0.1 (20B29) Final is Live! UPDATE 7:30PM CST – Full Installer Download issues look to be cleared up now. Step 4: Booting from the live Ubuntu USB on macOS. You should verify if the live USB works. To do that, restart your macOS. At start up when the Apple tune starts up, press and hold option (or alt) key. You should see a few options. If you see two EFI Boot options, choose either of them. Apr 27, 2021 Select Install macOS (or Install OS X) from the Utilities window, then click Continue and follow the onscreen instructions. Learn more A bootable installer doesn't download macOS from the internet, but it does require an internet connection to get firmware and other information specific to the Mac model. Jan 20, 2011 There are tons of awesome live, bootable Linux systems, but what if you need to run OS X? Reader Will shows us how to put a portable version of OS X on a thumb drive and boot it on (most) Intel.

DVD installation - Live CD installation - Live USB stick - Network installation - Remote installation - Partitioning - Installation help - Download help
This page explains how to create a bootable USB stick from a LiveDVD image file using Apple's macOS. Catalina

There is a dedicated article about how to Create a Live USB stick using Linux and how to Create a Live USB stick using Windows

Version: 12.2+This applies to openSUSE 12.2 and above.

Warning: The instructions on this page will destroy all data currently on the USB stick being used. Please be certain it does not contain important information.
  • 2Using Command Lines
Create macos live usb

Using Etcher

The Etcher program almost never fails and is the most straightforward method. It is also an open source software. It is recommended to consider this method before any other one.
The Etcher Logo

  1. Download the current ISO image of openSUSE Leap or Tumbleweed. The filename ends with '.iso'.
  2. Download, install and start Etcher
  3. Select the openSUSE .iso file you just downloaded using the 'Select Image' button.
  4. Plug a USB drive into you computer, if it's the only drive connected to your computer, it will be automatically selected. If not, select it.
    Warning: All data on the drive will be destroyed. The drive can be reformatted and used as a normal drive again after the setup is finished.
  5. Click 'Flash'. The process of burning can last from 1 to up to 30 minutes depending on your drive and on the iso file.
  6. Unplug the USB drive. It now contains a bootable openSUSE installation media.

Using Command Lines

Find Block Device

Plug-in your USB stick and find what '/dev/diskN' it is mapped to by opening Terminal (where 'N' stands for 'disk0', 'disk1', 'disk2' etc). To do so, please execute:

This will print out the list of currently mapped devices/partitions. Find the USB using 'NAME' column. Then note the corresponding /dev/diskN, where 'N' is for index of your disk. For example:

In this case '/dev/disk2' is the one we want.

Unmount USB Stick

Unmount the USB stick

Where /dev/diskN is the one you have found in previous step as per our example it would be '/dev/disk2'.

Write ISO to USB

Write the content of the ISO file:

Create macos live usb

/dev/rdiskN is the same disk you have found previously, with an r in front. r is for raw disk, as writing to /dev/rdisk2 is much faster than writing to /dev/disk2. You will be prompted for the administrator's password.

No progress is shown while writing this way. If you have Homebrew or MacPorts, you can get a progress bar by installing the 'pv' command and using that instead of 'cat'.

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Each operating system could crash at one time or another. While it's safe to say that macOS is more stable than Windows, it can still be affected by issues that prevent your computer from booting up. In such cases, you might need to boot your Mac from a USB install media to fix the problem. This article shows you two ways to boot Mac from external USB stick, as well as some troubleshooting tips in case Mac won't boot from the target USB.


Boot Mac from USB Option l: Startup Manager

If your Mac won't boot up normally, you can set it to boot from a different drive, such as a USB stick containing macOS installation files in bootable format. The drive will have to contain a version of the OS that is compatible with the Mac. As long as you have the bootable installation USB, you can start your Mac from the USB by accessing the Startup Manager. Here are the steps to be followed:

Step 1: Insert the bootable USB into Mac and power it on.

Step 2: As soon as the startup process begins, hold down the Option (alt) key and keep it depressed until you see the Startup Manager on your screen. If there is a firmware password on your Mac, hold down the Option key until you're asked to enter that password.

Step 3: You will now see the various startup disk options, and your USB will be listed there. If you click on the Up arrow right below the icon for the USB, the computer will only startup once using this disk. If you press and hold down the Control key while making your selection, it will be saved, and your computer will boot from the USB every time, as long as it is left in the computer.

At this point, you can also use the Mac installation disk to boot your Mac from. It will appear as EFI Boot, and it works on all computers running macOS 10.9 or higher.

Boot Mac from USB Option 2: macOS Recovery Mode

As an alternative, you can start your Mac in Recovery Mode. This will allow the system to automatically detect and repair directory issues. Recovery Mode will only allow required kernel extensions to load, preventing login items and startup items to load automatically. It can also help you isolate the issue depending on whether or not the issue goes away in Recovery Mode. If the issues you have during normal startup don't show up in Recovery Mode, they are most likely fixed. That means you can reboot normally and your system should be back to normal.

Step 1: Start your Mac and hold down the Shift key. You will see the Apple logo on your screen.

How To Make Mac Os Live Usb

Step 2: When you see the login screen, you can release the Shift key and login to your Mac.

Step 3: To check whether your Mac has booted into Recovery Mode, click on the Apple logo on the top left and then on About this Mac. In the window that opens, click on System Report… You should be able to see this:

Macos Live Usb Software

How to Fix Mac Won't Boot from USB Drive

Sometimes Mac won't boot from USB as expected. If you are unable to select a different startup disk, it's possible that your disk is not showing up in Startup Manager. If you try Method 1 above but don't see your USB drive listed there, it could mean one of the following problems:

Hardware Port: On old Mac models, the latest port such as USB 3.1 or Thunderbolt ports are not recognized at hardware level. You have to use USB 2.0 for making macOS bootable USB.

Compatibility: It is possible that the version of macOS or Mac OS X that you have on the USB drive is not compatible with the hardware. That means you won't be able to see it in the Startup Manager so, of course, you won't be able to boot from it. In such cases, you may need to burn a compatible macOS version on USB drive in order to be able to boot Mac from it.

Startup Security Utility: In certain cases where your Mac has the Apple T2 Security Chip (2018 and later devices), it may be your Startup Security Utility settings that are preventing you from booting from USB. In this situation, restart your Mac and hold down the Command + R keys when you see the Apple logo. This will put your Mac into Recovery mode. In macOS Utilities, go to Utilities >Startup Security Utility and sign in as admin. Under External Boot, select the second option - Allow Booting from External Media.

Option ROM Firmware: Another known issue is that Option ROM firmware will not load in Startup Manager until you press certain keys manually. To do this, use Method 1 to access Startup Manager. Once you are there, press Option-Shift-Command-Period. You should now be able to see the USB drive. This is not exactly a problem as much as a feature. If the USB contains Option ROM firmware, you will need to press those keys everytime to boot from your pen drive.

These two methods and the troubleshooting tips should allow you to boot from USB or in Recovery Mode so you can then isolate the problem that's preventing your Mac from booting up normally.