TS3680: iMac (Mid 2010): iMac shuts down or stops responding during startup

Learn about iMac (Mid 2010): iMac shuts down or stops responding during startup
KermodeBear
Level 1 (0 points)

Q: All energy saving options are set to never, but system still goes to sleep after about 30 minutes.  Is there another command line setting that can be use to see what options are set?

Trying to see what command line options may be to turn off all power saving options.  In System Preferences all energy saving options are set to never.  I've been reviewing PMSet cmds, but haven't got the correct one to work.  Is there a possible firmware update to a mid 2010 27" iMac that needs to be applied?

iMac, OS X Mavericks (10.9.2), 12GB RAM

Posted on Feb 26, 2014 3:35 PM

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KermodeBear

Q: All energy saving options are set to never, but system still goes to sleep after about 30 minutes.  Is there another command ... more

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  • by Eustace Mendis,

    Eustace Mendis Eustace Mendis Feb 26, 2014 4:07 PM in response to KermodeBear
    Level 7 (25,402 points)
    Feb 26, 2014 4:07 PM in response to KermodeBear

    Try a NVRAM reset:

     

    1. Shut down your Mac.
    2. Locate the following keys on the keyboard: Command (⌘), Option, P, and R. You will need to hold these keys down simultaneously in step 4.
    3. Turn on the computer.
    4. Press and hold the Command-Option-P-R keys before the gray screen appears.
    5. Hold the keys down until the computer restarts and you hear the startup sound for the second time.
    6. Release the keys.

    (from http://support.apple.com/kb/ht1379)