Macos Sierra Failed To Download


Cannot update and install latest macOS Sierra 10.12.1 in your Mac computer? Don't worry. Here in this article, we'll offer you effective methods to assist you fixing complex macOS Sierra update error such as fail to download or update stuck issue in Mac. You can simply follow below offered steps and solutions to fix this issue with ease now.

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Now let's follow to update and install macOS Sierra 10.12.1 in Mac computer without any obstacles or losing any data now.

Step 1. Backup important Mac data in advance

This upload contains tips that help fix macOS Sierra failed to download error msg when trying to install or upgrade to Sierra.If you're still having trouble. First off, thanks for the reply man. Would probably still be trying to source the answer to this in a few weeks time. Second off, I don't mind iTunes 11, I use it on my MacBook to sync stuff to my iPhone, but have iTunes 10.7 on my iMac purely for iTunes DJ to allow guests to vote up/request tunes.

In order to avoid unexpected data loss error or problems while installing new macOS Sierra in Mac, it's highly necessary to create data backups in advance.

You may directly apply Time Machine as a free tool to full backup your important Mac data with simple clicks.
If you don't have a backups and lost some data while installing new macOS Sierra update, you can try professional Mac data recovery software to get all lost data back.


Step 2. Fix macOS Sierra fail to download or 'An error has occurred' issue

If your Mac shows a error message that 'An error has occurred' or 'Failed to Download' while you are trying to downloading a new update for macOS Sierra. And this has become a common issue that many users have to face while upgrading Mac to a new operating system. And you may follow below tips to fix this issue:

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  • Open Launchpad > Delete 'Install macOS Sierra' file with a question mark on it;

Reboot Mac and retry to download a new macOS Sierra update 10.12.1:

  • Click Apple Menu > Select App Store > Click Update next to macOS Sierra in the Update section.

Then the new update of macOS Sierra 10.12.1 will be downloaded automatically for you. Then you can try to install the latest macOS update in Mac computer now. If you get stuck or frozen while installing macOS Sierra 10.12.1, you can jump to Step 3 to find solution.

Step 3. Solve macOS Sierra update stuck issue or install freeze error

If your Mac computer gets stuck or freezes up while installing macOS Sierra 10.12.1, don't worry. You may try below tips to fix this issue with ease now:

  • Disable or uninstall any Anti-virus software on your Mac;
  • Ensure Mac computer has a proper and reliable internet connection;
  • Install macOS Sierra in Safe Mode:

Hold Power till Mac shuts down > Turn Mac on and hold Shift key > Release Shift when Apple logo appears > Then Mac shall be booted into the Safe Mode.

Step 4. Download and install macOS Sierra 10.12.1 update

Now you can continue to download and install macOS Sierra 10.12.1 in Mac.
How? You can try to get a update in Mac by the follow clicks:


Click Apple Menu > Select App Store > Click Update next to macOS Sierra in the Update section.

Then you can run macOS Sierra 10.12.1 update and follow the on-screen instruction to install the new update in Mac computer with ease now.
And don't worry about losing any data if you have created backups in Step 1. If you don't have any backups and lose data while installing macOS Sierra 10.12.1, don't worry. Next we'll offer you effective tip to restore lost data due to macOS Sierra 10.12.1 update.

Tip: Restore lost data after macOS Sierra 10.12.1 update

Here we'd like to recommend you try professional Mac data recovery software - EaseUS Data Recovery Wizard for Mac which fully supports all macOS systems including the newest macOS Sierra 10.12.1, El Capitan, Yosemite etc. It allows you to restore all lost data due to macOS update or other reasons within 3 steps.

Just apply this software and follow this tutorial to restore files on Mac now.

Macos Sierra Failed To Download

A few months ago, Apple officially released its latest operating system, the macOS High Sierra, to the public. And with all other Mac operating systems, High Sierra is designed to make a Mac computer more reliable, capable, and responsive by refining the features and apps used by most Mac owners on a daily basis.

While there’s no doubt Apple created masOS High Sierra with the highest regard for quality and reliability, it is not totally invulnerable to errors. As more users continue to download, install, and use the new OS, more instances of macOS failures are being reported. In this article, you will learn how to fix macOS High Sierra installation error including the dreaded download and installation freezes, one of the main High Sierra problems.

1. Failed macOS High Sierra Download

High Sierra problems can be encountered right at the beginning when you first try to download the installation pack from the App Store. A number of users report getting a pop-up dialog that would say something along the lines of:

  • An error has occurred.
  • Failed to download.
  • macOS High Sierra download has failed.
  • Installation of macOS could not continue.

Of course, this is a problem because you cannot upgrade to macOS High Sierra. This error can be caused by the poor Internet connection, so make sure you have a good one. You may want to switch to a wired connection from a wireless connection in the meantime. If you’re using Macbook Air, make sure you’re in a spot where there’s a strong and reliable Wi-Fi connection. It’s also possible that there are too many users downloading at the same time, so you may want to try again a bit later.

Pro Tip: Scan your Mac for performance issues, junk files, harmful apps, and security threats
that can cause system issues or slow performance.

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Before you try downloading again, you need to reboot the App Store and delete temporary files from the previous download. Here’s how:

  • Go to Apple menu, look for the Apple logo at the upper left corner of your screen.
  • Choose Force Quit.
  • Look for App Store on the list. Click on it.

To remove partially downloaded files, go to your Downloads folder and look for items named macOS 10.13 High Sierra and then delete them.

Macos sierra failed to download update

2. Lack of Sufficient Disk Space to Install macOS High Sierra

MacOS High Sierra requires at least 2 GB of RAM and about 9 GB of hard disk space, but to ensure smooth installation and operation, you need to leave around 15 to 20 GB of free storage.

If you get an error message during installation saying that you don’t have enough hard drive space to install macOS High Sierra, consider doing any or all of the following:

  • Delete old, unused, and unnecessary files and apps.
  • Delete app caches.
  • Delete old device backups.
  • Delete unnecessary media files from iTunes.
  • Delete temporary files.
  • Delete unused dictionaries or language packs.
  • Move files you still want to keep but do not use on a daily basis to an external drive.
  • Compress large files.
  • Empty the Trash.

This may sound a lot but if you want to save some time looking for junk and broken files to delete, consider installing automated tools like. Running a scan using 3rd party tools allows you to find temporary and unneeded files with just one click of a button. Deleting those files through the same app is also as equally easy.


3. High Sierra Won’t Install

So you were able to download the installation package all right but the sad thing is that it won’t install. If this is the case, there might be conflicts with the existing macOS Sierra on your Mac. Here are the steps to fix this problem:

  • Open Launchpad.
  • Look for a file named Install macOS Sierra with a question mark. Delete it.
  • Restart your Mac.
  • Download the macOS 10.13 High Sierra update again.
  • Go to Apple menu.
  • Select Apple Store.
  • Go to Update. Click on Update next to macOS Sierra.

4. MacOS High Sierra Freezes While Installing

At last, you successfully downloaded the installation pack and got it to open but nothing happens. You try to click Continue but the button is greyed out. If you experience this, you’re definitely not the first one. This problem is what generally users encounter and report as they attempt to finally enjoy the new operating system. It is a real bummer, but don’t worry because there are still workarounds to this issue.

First, you might want to disable or uninstall any antivirus you have on your Mac for a moment as it might be preventing the installation. Second, you can try installing the update while in safe mode. To boot your Mac into safe mode, press the Power button while holding down Shift. Then, try to install masOS High Sierra once again. Third, quit the current, not responding, installation and then try again. To do this:

  • Press on Control and then click the installation icon on the Dock.
  • Click on Quit.
  • Go to Applications and then look for the macOS High Sierra Installation file. Choose it to quit it.
  • Repeat the installation.

5. Mac Won’t Boot After macOS High Sierra Installation

At this point, you might be thinking that there seem to be endless problems associated with the upgrade but you’ve come so far to quit. For boot problems after installation, all you need to do is reset the NVRAM or PRAM to make way for the new OS. By resetting the NVRAM or PRAM, your Mac will essentially start anew. To do, here are the steps:

  • Press the Power button while holding down Option, Command, P, and R all at the same time.
  • Wait until you hear the second startup chime before releasing the keys all at the same time.

6. Apps Crash After macOS High Sierra Installation

With the macOS High Sierra update, Apple completely moved to the 64-bit architecture. Unfortunately, some apps are yet to adapt to the change. If you are still using 32-bit apps, you need to update them if they already have a 64-bit update. Otherwise, you might need to uninstall them altogether.

However, uninstalling apps is more complicated than deleting files. There are tons of program files located in different folders you need to get rid of. To make your life easy, you can use tap any 3rd party tool to ensure complete and clean uninstallation of problematic apps.