Can't put iMac to manually to sleep since Mavericks

Discussion in 'OS X Mavericks (10.9)' started by seniorchang, Dec 18, 2013.

  1. seniorchang macrumors member

    Jun 14, 2012
    Since the upgrade to Mavericks on my late 2007 iMac I can't put it to sleep manually by cmd-alt-eject or through finder and not even by the sleep button on the back. The display just goes black but cpu/hd keeps working.

    The automatic sleep function after a certain time is working correctly though.

    Any ideas?
  2. Freyqq macrumors 601

    Dec 13, 2004
    Same exact issue, but with a new 2013 rmbp 15" with 750M. My current theory is it is a graphics card driver issue, as it only seems to occur when the 750M is active.

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