3 Replies Latest reply: Mar 23, 2013 3:20 AM by e.MinaTTi
Bobs41 Level 1 (0 points)

Computer does not wake from sleep mode

iMac, Mac OS X (10.6.8)
  • John Galt Level 8 (45,943 points)

    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

  • Gaylan Level 1 (70 points)

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

  • e.MinaTTi Level 1 (0 points)

    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.





      • 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.