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View Full Version : The Mountain Lion doesn't sleep tonight




Dr. McKay
Sep 15, 2012, 02:13 PM
Since I upgraded to ML from SL on my early 2008 imac, my mac never goes to sleep, not the display, nor the mac.
Changing energy settings does't change a thing.

Never had any issues like this in SL.
Anyone else experiencing these problems on this type of imac ?



GGJstudios
Sep 15, 2012, 02:16 PM
For sleep issues, you may find some useful ideas here:
OS X Mountain Lion: If your Mac won’t go to or stay in sleep (http://support.apple.com/kb/PH11080)
Mac OS X: Why your Mac might not sleep or stay in sleep mode (http://support.apple.com/kb/HT1776)
Determine why your Mac wakes up from sleep (http://osxdaily.com/2010/07/17/why-mac-wakes-from-sleep/)
One sleep problem caused by printers - solved (http://forums.macrumors.com/showpost.php?p=14336469&postcount=9) ... and another (http://forums.macrumors.com/showthread.php?t=1348871)
If your Mac isn't sleeping properly and you have gfxCardStatus (http://codykrieger.com/gfxCardStatus) installed, try uninstalling it.

Dr. McKay
Sep 15, 2012, 02:27 PM
Thx, I'll have a look.
Still, even when I am downloading files, running iTunes, indexing or whatever, at least I should be able to put the display to sleep...

GGJstudios
Sep 15, 2012, 02:30 PM
Thx, I'll have a look.
Still, even when I am downloading files, running iTunes, indexing or whatever, at least I should be able to put the display to sleep...
Did you try Control-Shift-Eject?

Dr. McKay
Sep 15, 2012, 03:06 PM
Did you try Control-Shift-Eject?

That works (thx by the way, didn't know about that one), but it's not normal I should have to do it manually. Did work in SL, so must be ML-related...

Weaselboy
Sep 15, 2012, 03:11 PM
Since I upgraded to ML from SL on my early 2008 imac, my mac never goes to sleep, not the display, nor the mac.
Changing energy settings does't change a thing.

Never had any issues like this in SL.
Anyone else experiencing these problems on this type of imac ?

You might try a SMC reset (http://support.apple.com/kb/HT3964).

Also try the below command in Terminal. It will show running processes that are keeping your Mac awake. Normal processes will be followed by 0 and those keeping the machine awake will have a 1.

pmset -g assertions

Dr. McKay
Sep 15, 2012, 03:44 PM
@Weaselboy : ran the command in terminal, all 0...

As for the SMC reset, I shut down AND pull the plug from the mains every day...

GGJstudios
Sep 15, 2012, 03:45 PM
As for the SMC reset, I shut down AND pull the plug from the mains every day...
Why?

Dr. McKay
Sep 15, 2012, 03:54 PM
Why?

Peace of mind ?

GGJstudios
Sep 15, 2012, 03:57 PM
Peace of mind ?
It's perfectly safe to leave your Mac on for many months at a time. Many users only use sleep mode, restarting only when a Software Update requires it. There is no need or benefit to shutting down every night, other than saving a few pennies worth of electricity.