For quite a long time my Mac Mini has refused to go to sleep. Recently my Macbook has been suffering from insomnia as well.

It took some digging, but after reviewing a dozen blogs, Stack Overflow posts, and Apple support articles, I got it sorted out.

Now they sleep like a baby.

I've compiled what I've learned into this list of (probably) every possible reason that a Mac won't go to sleep.

Mac Sleep Checklist

1. Disable Network Sharing
2. Unmount External Disks
3. Delete Wi-Fi Printers
4. Disable Handoff
5. Turn off Bluetooth Devices

Tools to cure Insomnia

pmset -g assertions

• https://forum.resilio.com/topic/34487-solved-bt-sync-20-preventing-sleep-on-mac-os-x-109/
• http://osxdaily.com/2017/09/10/how-disable-handoff-mac/
• https://www.macworld.com/article/1168151/find-out-whats-keeping-your-mac-awake.html
• https://macreports.com/macos-wont-go-to-sleep-fix/
• https://www.howtogeek.com/326965/what-is-the-powerd-process-and-why-is-it-running-on-my-mac/
• https://www.reddit.com/r/applehelp/comments/43ks7u/macbook_wont_go_to_sleep_hidd_preventing_sleep/
• https://discussions.apple.com/thread/7879854?answerId=31466214022#31466214022

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