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Fix macOS Sierra Update Stuck or Fail

Updated on Dec 14, 2017 by Abby Haines to Mac File Recovery


Follow the detailed steps to fix macOS Sierra stuck, froze or fail while downloading or installing. Don't ignore the behind tips to fully prepare your Mac for the update, and download EaseUS Mac data recovery software to recover lost data from macOS Sierra update.

The major update to Mac OS X - macOS Sierra official version now is released and available for all Apple users.Users can easily download and install the new update via Mac app store.But usually, macOS Sierra upgrade doesn't quite work the way it was intended.Many users reporting that macOS Sierra download stuck, macOS Sierra installation freeze, macOS Sierra installation stuck on grey screen or failed issue when they are trying to update to macOS Sierra. Have you ever encountered a similar macOS Sierra download or installation problem? don't worry! Here we show you how to fix macOS Sierra download stuck or failed to install issue with a step-by-step guide. 

Steps to fix macOS Sierra stuck,frozen or fail while downloading or installing

1. Get rid of any antivirus software installed on your Mac. 
2. Make sure you have created a Time Machine backup on hard drive. 
3. Press the power button and hold down the Shift key. 
4. Try updating software in Safe mode. 
5. Switch from wireless connection to hardwired connection. 

Whenever you faced macOS Sierra stuck, freeze or fail during downloading or installation, you can follow the above steps to fix the issue. And then you can get the update installed on your device successfully with no hassle. 

Tips to avoid macOS Sierra stuck, freeze or fail issue

For a safe and successful macOS, Sierra upgrade. Here we offer you some useful tips which can help to avoid macOS Sierra stuck, freeze or fail during the upgrade process.

Tip 1. Check whether your Mac device is available for macOS Sierra update

Before downloading and installing macOS Sierra, it’s quite necessary to check out whether your Mac device is available for the new system or not. Otherwise, you might encounter macOS Sierra upgrade stuck, freeze or fail issue.

2009 and later: MacBook, iMac

2010 and later: MacBook Air, MacBook Pro, Mac mini, Mac Pro

Tip 2. Prepare your Mac devices ready for macOS Sierra update

To avoid macOS Sierra download or install stuck, freeze or fail issue, it’s also necessary to check out what needs to be done firstly for gaining macOS Sierra smoothly on your Mac device. 

  • Leave at least 2GB memory and 8.8 GB storage space on your Mac device.
  • Leave at least 45% battery in your Mac.
  • Backup all your personal data and even create backups for your present Mac data through Time Machine.

Tip 3. Recover lost data after macOS Sierra update

If you lost your data after macOS Sierra upgrade but forgot to make a backup, you’ll need to find professional Mac data recovery software to retrieve them back. EaseUS Data Recovery Wizard for Mac works well to recover data after Mac OS upgrade. It allows you to effectively restore files like Office files, music files, videos, pictures, emails or other archives within 3 simple steps. 

Step 1. Where was data lost after operating system update? Choose the location and click Scan.

select the location where data lost after operating system update and click scan

Step 2. EaseUS Data Recovery Wizard for Mac will immediately scan your selected disk volume and display the scanning results on the left pane.

scan the selected drive to find lost data

Step 3. After the scan, select the target files that were unknowingly lost during or after the update and click Recover Now button to get them all back.

click the recover now button to recover lost data after the operating system update