2 Replies Latest reply: Sep 11, 2012 2:59 PM by JoeKool7
JoeKool7 Level 1 (0 points)

Could you please provide the detailed instruction on how do do this reset, including removing battery and power, what keys to press, and re-installing battery and power and in what order.

Thank you,


MacBook, Mac OS X (10.6.8)
  • Jon P D Level 4 (1,515 points)

    Resetting the SMC on Mac portables with a battery you can remove

    1. Shut down the computer.
    2. Disconnect the MagSafe power adapter from the computer, if it's connected.
    3. Remove the battery.
    4. Press and hold the power button for 5 seconds.
    5. Release the power button.
    6. Reconnect the battery and MagSafe power adapter.
    7. Press the power button to turn on the computer.




    Resetting NVRAM / PRAM

    1. Shut down your Mac.
    2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
    3. Turn on the computer.
    4. Press and hold the Command-Option-P-R keys before the gray screen appears.
    5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
    6. Release the keys.




    Copied form Apple support website

  • JoeKool7 Level 1 (0 points)

    Thank you very much for being specific, much appreciated!