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Problem with waking from sleep with 10.8.2

My Mac Pro (early 2009 2.66 GHz Quad-Core Intel Xeon) won't wake from deep sleep after installing OS X 10.8.2 . I have the default setting set for sleep. The only way to "wake" the machine is to hold the power button down to shut down and then restart. I've reset NVRAM (pram) and tried removing power cable. Nothing helps.

Mac Pro, OS X Mountain Lion (10.8.2)

Posted on Sep 21, 2012 1:53 PM

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267 replies

Sep 23, 2012 7:24 AM in response to SusanLake

Same problem after 10.8.2 installation with retina/macbook pro. Also installed firmware update. The only way I have been able to resolve the problem is as described above--forced shutdown and then restart. I did do an SMC reset after the first instance (Saturday evening) but the problem recurred after computer was put to sleep Saturday night. One note: when I put the machine to sleep prior to the first instance of the problem, I had to choose sleep from the apple menu four times. Very smart computer did not want to go to sleep. Reminiscent of Invasion of the Body Snatchers.

Problem with waking from sleep with 10.8.2

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