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HelmutNewton Author

Level 1

37 points

Mac Pro 5,1 won't sleep anymore

So my 5,1, which has been great for the past few years, has stopped going to sleep lately. When I hit sleep from the Apple menu, the monitor goes into Energy Saving mode, and....nothing else happens. So far, I've tried an SMC reset, unplugged everything except mouse, monitor and keyboard. I also checked Activity Monitor under Energy. And it said nothing was preventing sleep. And the Energy Saver preference has "Wake for network access" unchecked and "Put hard disks to sleep when possible" is checked.

I am running Mojave, latest version 10.14.6. The only software I've updated lately is a Firefox update to 76.0.1.

Any ideas??

Mac Pro, macOS 10.14

Posted on May 16, 2020 11:27 AM

Top-ranking reply

HelmutNewton Author

Level 1

37 points

Posted on May 16, 2020 1:28 PM

Okay, I discovered the problem. There was an old print job in the queue. Once I cleared it, it was able to go back to sleep.

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Mac Pro 5,1 won't sleep anymore

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