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.