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iMac no turn off

146 Views 2 Replies Latest reply: Dec 10, 2012 5:44 AM by Linc Davis RSS
Hutte Calculating status...
Currently Being Moderated
Dec 10, 2012 4:48 AM

My iMac Intel (2010) no turn off.


Thank you

iMac, Mac OS X (10.7)
  • Radiation Mac Level 5 Level 5 (4,630 points)
    Currently Being Moderated
    Dec 10, 2012 4:53 AM (in response to Hutte)

    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

  • Linc Davis Level 10 Level 10 (107,980 points)
    Currently Being Moderated
    Dec 10, 2012 5:44 AM (in response to Hutte)

    What happens when you try to turn it off?


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