2009 iMac Won't Sleep!

mikey4020

macrumors regular
Original poster
Sep 27, 2007
128
3
UK
So my 2009 iMac won't sleep under Mountain Lion. Have tried the usual advice on Apple's site regarding resetting PRAM etc. I have copied what appears in Console when I try to get it to sleep. Wondering if anyone had any ideas...

29/08/2012 14:06:59.067 com.apple.backupd-helper[2856]: Not starting Time Machine backup after wake - less than 60 minutes since last backup completed.
29/08/2012 14:07:00.121 WindowServer[87]: Created shield window 0x52 for display 0x04272580
29/08/2012 14:07:00.129 WindowServer[87]: device_generate_desktop_screenshot: authw 0x0(0), shield 0x0(0)
29/08/2012 14:07:00.142 WindowServer[87]: device_generate_lock_screen_screenshot: authw 0x0(0), shield 0x0(0)
29/08/2012 14:07:00.154 WindowServer[87]: handle_will_sleep_auth_and_shield_windows: no lock state data
 

Dechter

macrumors member
Jul 11, 2010
65
0
I have a late 2009 27-inch iMac running 10.8.1 that is doing the same sort of thing. If I select Sleep from the Apple menu, it sleeps just fine. However, if I wait for it to go to sleep based on the settings in Energy Saver, it will just sit at the desktop all day long.

I tried the SMC reset and PRAM reset, to no avail. I eliminated hardware failure as a possibility by booting back into Lion (10.7.4) on an external HD and after a few minutes the screen turns off and the computer sleeps as specific in Energy Saver.

It's a weird one. I'm hoping that 10.8.2 will fix it as that's due out in a few weeks (to coincide with iOS 6). That said, if anyone has any ideas, I'm game.
 

Dechter

macrumors member
Jul 11, 2010
65
0
Are either of you using network sharing?
Yes, I am. I have two iMacs in the house. iMac 2 hosts a shared folder that iMac 1 connects to on occasion. Do you think it could be related?

iMac 1 = 27-inch iMac model 11,1 OSX 10.8.1 will not sleep unless set manually
iMac 2 = 21.5-inch iMac model 10,1 OSX 10.8.1 sleeps like a baby after 15 mins idle
 
Last edited:

53kyle

macrumors 65816
Mar 27, 2012
1,275
92
Sebastopol, CA
Yes, I am. I have two iMac's in the house. iMac 2 hosts a shared folder that iMac 1 connects to on occasion. Do you think it could be related?

iMac 1 = 27-inch iMac model 11,1 OSX 10.8.1 will not sleep unless set manually
iMac 2 = 21.5-inch iMac model 10,1 OSX 10.8.1 sleeps like a baby after 15 mins idle
Maybe. It would be normal for the host computer not to sleep so that there is a constant connection to the other computer
 

benthewraith

macrumors 68040
May 27, 2006
3,073
80
Miami, FL
So my 2009 iMac won't sleep under Mountain Lion. Have tried the usual advice on Apple's site regarding resetting PRAM etc. I have copied what appears in Console when I try to get it to sleep. Wondering if anyone had any ideas...
What does pmset -g assertions show in Terminal?
 

desertman

macrumors 6502a
Jul 14, 2008
603
19
Arizona, USA
... my 2009 iMac won't sleep under Mountain Lion.
I had the same with my previous "Late 2009" iMac and OS X 10.6 and 10.7. In my case it obviously had to do with one or some of my attached USB devices because when I disconneced all of them Sleep worked just fine. I never went through the devices methodically to find out which one exactly caused this. You might want to try whether disconnecting all USB devices also makes a difference in your case.
 

claaariii

macrumors newbie
Feb 12, 2010
8
2
I've had the same problem for 3 weeks, tried everything and just got help solving it - in my case there was a file in the printer queue waiting to print, and that was keeping the computer from sleeping!