HDD doesn't sleep

Hi all,

I just upgraded to High Sierra on my early 2009 Mac Pro. Now, it doesn't completely go to sleep. It turns off the video and, as far as I can tell, things like Mail and Messages go quiet. The pilot light never goes into sleep mode. The fans continue to run, and once in a while I hear the HDD take a bump.

I've looked at all the energy saver and security settings. Those didn't change from previous.

I reset the SMC and NVRAM.

EtreCheck shows nothing out of the ordinary.

Searching through the supposed relevant posts didn't reveal others with a similar issue.

Mac Pro, macOS 10.13

Posted on Apr 25, 2020 9:37 AM

Top-ranking reply

Eau Rouge

Level 8

42,656 points

Posted on Apr 25, 2020 10:45 AM

Have a look and see if Internet Sharing is checked in System Preferences> Sharing, if it is checked the mac will not sleep properly, the screen will go off but the pilot light will not go into sleep mode.

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HDD doesn't sleep

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