Mac Shut Down/Turned Off During OS Update? Here’s the fix


Many Mac users have a complaint that their mac turned off during software update. They said sometimes their Mac shut down during installation. One of the Mac users said some solutions to fix this issue. If you have the same issue, this article will help you to solve it.
Before trying these solutions, Make sure that your Mac has enough space to download the software.
Solution 1: Fix disk errors in Recovery Mode

  1. Turn off your Mac via Apple Menu->Shut Down.
  2. Then Press the Power Button to turn on your Mac.
  3. Press and hold the Command + R keys simultaneously as soon as possible after pressing the Power Button until the Apple Logo appears.
  4. After that macOS Utilities window will appear with 4 options. Tap “Disk Utility” and then click  “Continue”.
  5. Select the disk/drive (Macintosh HD) that you want to repair.
  6. Select First Aid->Run. This action will check the disk for errors.
  7. Click “Done”.
  8. Close Disk Utility.
  9. Select “Reinstall macOS” and then click “Continue”.
  10. You will be prompted to choose your hard disk/drive. If you are not asked to select your disk, tap “Show All Disks”. You may need to enter your Apple ID.
  11. Tap “Install”. Wait until the installation process is completed.
  12. Your Mac will restart after completing the installation.

Solution 2: Restart your Mac in Safe Mode (Safe Boot)
Restart your Mac in Safe Mode will fix many issues on your Mac. But you can’t use some features in Safe Mode.

  1. Press and hold the Power Button to turn off your Mac.
  2. Turn on your Mac.
  3. Press and hold the Shift Key as quickly as possible after you hear the startup sound.
  4. Keep pressing the Shift Key until you see the Login Window.
  5. Enter your User Name & Password to login. You may need to login twice if FileVault is turned on.
  6. Now update the OS and check whether your Mac turns off or not.

Solution 3: Reset SMC
If your Mac has a non-removable battery,

  1. Shut down your Mac by pressing the Power Button.
  2. Press and hold the Shift + Control + Option + Power Button simultaneously.
  3. Then release the keys at the same time.
  4. Press the Power Button to turn on your Mac.

If your Mac has a removable battery,

  1. Remove the battery out of your Mac.
  2. Press and hold the Power Button for 5 seconds.
  3. Insert the battery into your Mac.
  4. Turn on your Mac.

Solution 4: Reset NVRAM/PRAM

  1. Turn off your Mac via Apple Menu->Shut Down.
  2. Press the Power Button to turn on your Mac.
  3. Then immediately press and hold the Option + Command + P + R keys simultaneously as quickly as possible after pressing the Power Button.
  4. Keep pressing until you hear the startup sound for the second time.

If you know any other solutions to fix this issue, let us know through your comments.

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