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How to disable sleep mode in mountain lion for an iMac

Hello, I am extremely annoyed after upgrading to Mountain Lion on my iMac. I want to permanently disable sleep mode on the iMac. Currently, it keeps trying to quit all the programs like iTunes while it is still downloading purchases, and if you leave the mac for several hours, you get several prompts in iTunes asking if you want to quit iTunes because you still have downloads remaining.


I have already set the energy saver preferences to "Never" sleep, but the iMac continues to try to put the computer to sleep, or at least to quit iTunes and other open programs.


I know I can run caffeinate, but that will only run while Terminal is open.


Thanks for any help.

iMac (21.5-inch Mid 2011), Mac OS X (10.7.4)

Posted on Sep 5, 2012 7:54 PM

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10 replies

Oct 14, 2012 2:10 PM in response to William Lloyd

Similar issue here.....Just moved to Mountain Lion and System seems to sleep and terminate all downloads. uploads and work in progress. This means I need to be at my computer if it is processing (but not being used directly by me) to wake it up should it nod off...can't upload to Youtube....it pauses uploads when computer sleeps, it pauses applications doing some grunt work for me.


I've heard ccomments in other news groups that this is a low priority nuisance, niot a severe bug. Couldn't disagree more, it has reduced my computers usefulness......I want it to work when I'm not. That's really one of the key purposes of a computer.


I've put my settings to Never Sleep....not my preference, but maybe that will allow me to download or upload, or start processes while I make dinner/go for a walk/etc...

Dec 26, 2012 6:25 AM in response to j19stan

j19stan wrote:


I think I figured out my issue and maybe everyone else's. Go to system preferences, security. Click on the privacy tab. Click on Advanced in the lower right corner. Make sure that "Log out after ... minutes of inactivity" is unchecked.


Let me know if it fixes your problems.


Thanks,

Josh

This worked for me thanks Josh

How to disable sleep mode in mountain lion for an iMac

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