Q: What's causing my new Mac Pro to not wake from sleep mode?
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Jun 1, 2016 10:06 AMby lllaass,Is the computer waking from sleep, that is the Power light goes from slowly flashing to steady?
Or is the monitor not waking?
Those are two separate problems.
If the former see:
If your Mac doesn't sleep or wake when expected - Apple Support
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Jun 1, 2016 11:23 AMby danole,When it works properly, the light goes from 'slowly flashing', to steady, and the computer wakes. When it errors, I get a steady light but no waking – no display picture. Pretty sure it's not monitor related. FYI, monitor is Apple Cinema Display.
Also, I have a screen shot of the OS Error Report. I have attached...
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Jun 1, 2016 12:26 PMby lllaass,As Grant said, Machine Check errors are typically hardware problems. I would run Apple hardware test, it MAY reveal a hardware problem
Using Apple Hardware Test - Apple Support
Also if you open the Console app and under Diagnostic and Usage information>System Diagnostic Reports are any GPU restart or similar GPU errors listed?
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Jun 2, 2016 11:09 AMby danole,Apple Hardware Test came up negative, no problems found. I have adjusted my Control Panel settings to not select 'Put hard disks to sleep when possible.' Will see if that has any effect.
Also, as an FYI for those advising, this morning I came in to wake the computer, and beforehand I looked at the Power light. It was completely off. However, when I clicked the mouse, it came on and the computer woke up. Is that normal condition of Sleep Mode?
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Jun 2, 2016 12:34 PMby lllaass,When Sleeping the Power light will slowly flash.
If you noted the time you woke it up you can open the Console app and look for messages at that time. Look for ones that include the work Sleep or low powr
I can't get my 2013 to Sleep but can get it to go into low power mode. The Power light is still steady white but it is still doing something since the fan is still running and I can feel the fan low and heat.
