Sleep mode issue - won't go to sleep

I can manually put my Mac Pro to sleep but it will not go to sleep on it's own with the prescribed time set in the power settings. I leave it for long periods thinking it will sleep on its own, but come back to find the monitor has been asleep, but not the computer. I have unplugged everything from the back of the unit for a time to discharge the tower, I have reset the Safari plist preferences, and I have repaired permissions. Probably not a huge concern here, but it was working properly a few days ago. Any suggestions?

Mac Pro, Mac OS X (10.5.6)

Posted on Jan 1, 2009 2:24 PM

47 replies

Dec 5, 2009 12:14 PM in response to alphabuild

I too have this problem. I tried everything on this board and still no sleep at the designated interval in the energy pref pane. It sleeps when i choose itfrom the apple menu, and when scheduled, but otherwise no dice.

I am going to do a complete, fresh, install of SL. New user account, fresh application installations, EVERYTHING. I HAVE WASTED SO MUCH TIME DEALING WITH SNOW LEOPARD AND MY NEW $3500 MACHINE!

I am wondering, it seems clear that this has something to do with hardware, as we all have '09 mac pro's. I am curious how many '09 mac pro quads DO NOT have this problem...

...is the problem solvable with software or is it a hardware issue?

thanks,
r.

Dec 5, 2009 11:07 PM in response to bkile

I have the same issue with my new 09 Mac Pro. If I let it go to sleep by itself, rather than manually putting to sleep, then only the screen sleeps but the computer does not. It did this right out of the box before I had any peripherals connected to it. Has anyone discovered a solution to this? Will Apple Care handle it? If so, how?

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Sleep mode issue - won't go to sleep