4 Replies Latest reply: Feb 17, 2013 10:14 AM by Eric Root
Adam Berch Level 1 (55 points)

I work on my mac a few hours everyday. I often work for a couple of hours, step away for a little while, then come back & work some more.


Ever since I upgraded to Mountain LIon, I cannot wake up my Power Mac after it sleeps. I have to do a hard re-boot. This is very annoying. Since there is no fix for this as of yet, I was wondering if I should just leave the computer on with the monitors going to sleep after 15 minutes, or turn the computer off everytime I leave and turn it back on when I come back later?



Thanks in Advance


Intel Power Mac

10GB Ram

2.66 GHz Quad-Core Intel Xeon


OX Version 10.8.2

power mac G5, Mac OS X (10.3.8)
  • Kappy Level 10 (265,666 points)

    How do you manage to run Mountain Lion on a PM G5? I'm guessing you are running a Mac Pro generation 3 or higher.


    You might instead try to determine why your computer will not wake from sleep properly.


    Try creating a new user account with admin status. Log out of your account and log into the new account. Does the problem persist. If not, then you have something in your user account that is causing the wake from sleep problem. Now comes the hard part - finding the cause.

  • Adam Berch Level 1 (55 points)

    Hi, Thanks for your response.


    I have a

    Intel Power Mac

    10GB Ram

    2.66 GHz Quad-Core Intel Xeon


    not a G5.


    I have been trying to find out a solution to how to fix my not waking from sleep problem, but I cannot find the answer. It seems like a lot of other people are having the same issue as me. It only started to happen after I upgraded to Mountain Lion last week.


    I usually did put my Mac to sleep before this started to happen.


    Now I'm wondering if I should just leave it on or turn it off when I'm not going to use it for a few hours.


    Thanks in advance.

  • Kappy Level 10 (265,666 points)

    Well, try my suggestion from my previous post. Unless you have a hardware problem this is a fixable problem. I've been using a Mac Pro since 2006 and have not had such a problem. Often they trace down to a corrupted file that is preventing some process from waking up or sleeping properly.


    You can leave it on all the time if you prefer, but it would be better to fix the problem.

  • Eric Root Level 8 (49,978 points)

    If Kappy's suggestion doesn't isolate the problem, you might try booting into the Safe Mode as it resets some things.


    Safe Mode


    Safe Mode - About


    The following has worked for some Macbooks, and the same might apply.


    Boot to Recovery drive (command - R). Run Disk Utility/Repair Permissions and Repair Disk. Reboot to startup disk. Hold down the option key while using the Finder "Go To Folder" command. Enter ~`/Library. Delete Cache folder and Cookies folder. Empty trash.