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.

Macos Sierra Failed To Download In Recovery Mode Windows 7
Macos Sierra Failed To Download In Recovery Mode Windows 8

PAGE CONTENT:

Step 1. Backup important Mac data in advance
Step 2. Fix macOS Sierra fail to download or 'An error has occurred' issue
Step 3. Solve macOS Sierra update stuck issue or install freeze error
Step 4. Download and install macOS Sierra 10.12.1 update
Tip: Restore lost data after macOS Sierra 10.12.1 update

Macos Sierra Failed To Download In Recovery Mode

Extra Tip: Recover lost data after macOS High Sierra update. Professional Mac data recovery software - Fireebok Data Recovery for Mac allows you to restore all lost data due to macOS update or other reasons within 2 steps. If you lost any data while installing macOS High Sierra, just download it and let it help get all lost data now. Rebooting in Recovery Mode & reinstalling macOS Sierra/High Sierra. To restart and reinstall the operating system, start up with Command+R keys. You should not release the keys until the company’s logo pop up. The appearance of the Utilities window means the bootup process is over. MacOS Sierra is the newest version of Mac OS which has recently become available for the Mac users to download. As always, there are some downsides to the new software updates that some computer users experience.

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

As of macOS 10.12.4, released on Monday, a new keystroke combination at launch will allow Macs to netboot, and download the latest OS compatible with a computer when performing a recovery. Create a bootable installer. Download the macOS Sierra 10.13/10.13.4 installation package from.

Step 1. Backup important Mac data in advance

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:

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.

Or you can directly download it by click below link:
Download macOS Sierra 10.12.1 Update

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.

If you are trying to find effective solutions to fix macOS High Sierra update stuck or failure error, you are at the right place. If you cannot download or install macOS 10.13 update on your Mac, or macOS 10.13 gets stuck, freezes or fails to install, don’t panic and just simply follow these instructions.

macOS High Sierra 10.13 downloaded but won’t install!

If you get stuck or fail to install the downloaded macOS 10.13, follow any one of the below tips to fix the issue:

Open Launchpad > Delete 'Install macOS Sierra' file with a question mark on it
Reboot Mac and retry downloading a new macOS Sierra update 10.13
Click Apple Menu> Select App Store > Click Update next to macOS Sierra in the Update section.

macOS 10.13 High Sierra fails to install/gets stuck or freezes while installing!

You can go with two troubleshooting methods to fix the macOS 10.13 installation failure error:

Method #1. Install macOS update in Safe Mode to fix the macOS High Sierra 10.13 update stuck error

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 until your Mac shuts down > turn your Mac on and hold the Shift key > release Shift when the Apple logo appears > The Mac shall be booted into the Safe Mode
Then try to install macOS 10.13 update again

If you cannot install macOS 10.13 in Safe Mode, try a clean installation of the new update.

Method #2. Clean installation of macOS High Sierra 10.13 to fix macOS fails to install issue

To complete a clean installation of macOS High Sierra 10.13 on Mac, you may need to do some pre-installation preparation:

Step 1. Create a bootable installer

To do this, follow below-mentioned guidelines:

Download the macOS Sierra 10.13 installation package from Mac App Store
Connect a new USB drive with Mac > OpenDisk Utility in Applications/Utilities folder > Select thumb drive in sidebar and click Format
Name USB as Untitled > Choose OS X Extended > Click Erase > Open Terminal once the USB is formatted and finish downloading macOS Sierra
Ensure USB named Untitled is connected to Mac > Type below command in Terminal and hit Enter: sudo /Applications/Install macOS Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/SierraBootInstall --applicationpath /Applications/Install macOS Sierra.app --nointera

Macos Sierra Failed To Download In Recovery Mode