iMac shuts down upon reboot

Discussion in 'iMac' started by Sumrday, Apr 16, 2016.

  1. Sumrday macrumors newbie

    Sumrday

    Joined:
    Apr 16, 2016
    #1
    my computer was doing automatic system update and has gotten stuck. I now have a white screen with spinning wheel that shuts down after 20 seconds. Unable to reset or access menu.

    Anyone know how to fix this.
     
  2. Buerkletucson macrumors 6502

    Buerkletucson

    Joined:
    Sep 12, 2015
    #2
    System restore from Time Machine backup...

    https://support.apple.com/en-us/HT201314
     

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