4 Replies Latest reply: Feb 14, 2013 6:50 PM by JSheffel
JSheffel Level 1 (0 points)

I have an older iMac (2.66 GHz Intel Core i5) with upgraded memory (8GB) running OS X v10.8.2.  The computer freezes and must be rebooted every time it sits long enough to go in to sleep mode.  What can I do?

iMac, OS X Mountain Lion (10.8.2)
  • MichelPM Level 6 (11,450 points)

    If you have any other type of USB/FireWire devices, other than keyboard and mouse plugged into your iMac, try disconnecting all those devices and then put your iMac to sleep, again, and see if this stops the freezing or not.

  • JSheffel Level 1 (0 points)

    I was out of town and just got to try this.  Unfortunately, it did not solve the problem.

  • Paul_31 Level 6 (13,655 points)

    This is a workaround rather than a fix. The failure to wake from sleep problem seems to be connected with Bluetooth devices not waking properly/fully - and the problem only seems to effect some users. This works for me 100% of the time, pending a proper solution in a future OS update - hopefully.

    Go to: System Preferences>Energy Saver and set 'computer sleep' to 'never'.

  • JSheffel Level 1 (0 points)

    Thanks.  At least for now this solved my problem.