iMac SMC and PRAM reset

Version 2
Last Modified: May 16, 2014 9:16 AM

SMC RESET

 

  • Shut down the computer.
  • Unplug the computer's power cord from both the wall and computer.
  • Wait 15 seconds.
  • Attach the computers power cable.
  • Wait another 5 seconds and press the power button to turn on the computer.

 

 

PRAM RESET

 

  • Shut down the computer.
  • Locate the following keys on the keyboard: Command, Option, P, and R. You will need to hold these keys down simultaneously in step 4.
  • Turn on the computer.
  • Press and hold the Command-Option-P-R keys. You must press this key combination before the gray screen appears.
  • Hold the keys down until the computer restarts and you hear the startup sound for the second time.
  • Release the keys.