1 Reply Latest reply: Dec 7, 2011 7:24 PM by rkaufmann87
donnafromjamaica plain Level 1 (0 points)

The fan on my imac runs fast and doesn't stop. I have to shut down the computer to get it to stop.

Why is it doing that and how do i stop it?

iMac, Mac OS X (10.6.8)
  • rkaufmann87 Level 9 (55,238 points)

    Reset the SMC using the directions below:




    • Shut down the computer.
    • Unplug the computer's power cord and all peripherals.
    • Press and hold the power button for 5 seconds.
    • Release the power button.
    • Attach the computers power cable.
    • Press the power button to turn on the computer.




    • 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.