Bobs41

Q: Computer does not wake from sleep

Computer does not wake from sleep mode

iMac, Mac OS X (10.6.8)

Posted on Mar 29, 2012 4:33 PM

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Q: Computer does not wake from sleep

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  • by John Galt,

    John Galt John Galt Mar 29, 2012 4:57 PM in response to Bobs41
    Level 8 (49,171 points)
    Mac OS X
    Mar 29, 2012 4:57 PM in response to Bobs41

    What kind of iMac? This is posted in the PPC area and you're running OS X 10.6.8 which is Intel only.

     

    G5 iMac: How to Reset the SMU

    Intel Mac: How to Reset the SMC

  • by Gaylan,

    Gaylan Gaylan Mar 29, 2012 6:03 PM in response to Bobs41
    Level 1 (70 points)
    Mar 29, 2012 6:03 PM in response to Bobs41

    In the energy saver prefrences (found in system prefrences) is the display set to sleep before the computer ?

  • by e.MinaTTi,

    e.MinaTTi e.MinaTTi Mar 23, 2013 3:20 AM in response to Bobs41
    Level 1 (4 points)
    Mar 23, 2013 3:20 AM in response to Bobs41

    The ONLY THING which solved my problem - MacBook Air 2010 not turning on from sleep - was killing the hibernatemode. I tried everything, all the tips we can find here or elsewhere. Nothing worked: reseting SMC, PRAM, selecting startup disk, reformatting, reinstaling i.OS, everything.

     

    But, THIS TRICK HAS WORKED:

     

     

      • Launch Terminal (/Applications/Utilities/Terminal.app)
      • run pmset -g | grep hibernatemode
      • If you see "hibernatemode     3", you may go on the process, or else you need to stop and try other solution
      • run sudo pmset hibernatemode 0
      • Enter your admin password

    After that, my computer always start when I open the lid. Perfectly.