2 Replies Latest reply: Dec 10, 2012 5:44 AM by Linc Davis
Hutte Level 1 Level 1 (0 points)

My iMac Intel (2010) no turn off.


Thank you

iMac, Mac OS X (10.7)
  • 1. Re: iMac no turn off
    Radiation Mac Level 5 Level 5 (4,635 points)

    Press and Hold the Power button until it shuts off.  Then I would recommend you Reset the SMC and the PRAM:



    Resetting the System Management Controller (SMC)

    Resetting the SMC for Mac Pro, Intel-based iMac, Intel-based Mac mini, or Intel-based Xserve

    1. Shut down the computer.
    2. Unplug the computer's power cord.
    3. Wait fifteen seconds.
    4. Attach the computer's power cord.
    5. Wait five seconds, then 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.


    Hope this helps

  • 2. Re: iMac no turn off
    Linc Davis Level 10 Level 10 (118,005 points)

    What happens when you try to turn it off?