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mac won't go to sleep

My Mac will not go to sleep

Mac Pro, OS X Mountain Lion (10.8.2)

Posted on Feb 10, 2013 9:13 AM

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Question marked as Best reply

Posted on Feb 10, 2013 9:40 AM

Triple-click anywhere in the line below to select it:


pmset -g assertions


Copy the selected text to the Clipboard (command-C).


Launch the Terminal application in any of the following ways:


☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.


Paste into the Terminal window (command-V).


Post any lines of output that appear below what you entered — the text, please, not a screenshot.

3 replies
Question marked as Best reply

Feb 10, 2013 9:40 AM in response to gmh10

Triple-click anywhere in the line below to select it:


pmset -g assertions


Copy the selected text to the Clipboard (command-C).


Launch the Terminal application in any of the following ways:


☞ Enter the first few letters of its name into a Spotlight search. Select it in the results (it should be at the top.)


☞ In the Finder, select Go Utilities from the menu bar, or press the key combination shift-command-U. The application is in the folder that opens.


☞ Open LaunchPad. Click Utilities, then Terminal in the icon grid.


Paste into the Terminal window (command-V).


Post any lines of output that appear below what you entered — the text, please, not a screenshot.

Apr 9, 2014 9:22 AM in response to Linc Davis

Same issue, did th Terminal thing, here's what I get:


Last login: Mon Apr 7 08:52:21 on console

unknown60334b10d4ba:~ EricSchwartz$ pmset -g assertions

4/9/14 9:21:06 AM PDT

Assertion status system-wide:

PreventUserIdleDisplaySleep 0

PreventSystemSleep 0

PreventUserIdleSystemSleep 0

ExternalMedia 0

UserIsActive 0

ApplePushServiceTask 0

BackgroundTask 0



Kernel Assertions: 0x0128

* Kernel Assertion ID = 500

Created At = 12/31/69 4:03:16 PM PST

Modified At = 4/9/14 9:22:47 AM PDT

Owner ID = 0xffffff80dc679000

Level = 0

Assertions Set = None (4)



* Kernel Assertion ID = 501

Created At = 12/31/69 4:03:36 PM PST

Modified At = 12/31/69 4:00:00 PM PST

Owner ID = 0xffffff80dc69c000

Level = 0

Assertions Set = None (4)



* Kernel Assertion ID = 679

Created At = 4/9/14 9:29:27 AM PDT

Modified At = 12/31/69 4:00:00 PM PST

Owner ID = 0xffffff801cf75f00

Level = 255

Assertions Set = None (128)



unknown60334b10d4ba:~ EricSchwartz$

mac won't go to sleep

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