Turn Off Mac


Locate the following keys on the keyboard: Option, Command (⌘), P, and R.


  • Turn on your Mac.


  • Immediately press and hold the Option-Command-P-R keys. You must press this key combination before the black screen with the Apple logo appears.


  • Continue holding the keys down until your Mac restarts, and you hear the startup sound for the second time.


  • Then release the keys.