428      iPhone_iPad_Mac_apple

iMac won't sleep

Hello,

I have an iMac Retina 5K, 27", late 2014, running Sierra 10.12.6.  I upgraded from Yosemite to Sierra earlier in the year. 

Since Sierra, this iMac will not go to sleep unless I manually choose it from the Apple Menu or move my cursor to the hot corner I have configured.  It won't even go to Screen Saver on its own.

Settings:  Activate Screen Saver in 10 minutes.

Energy Saver: Turn display off after 15 minutes.

These options are enabled:

- Put hard disks to sleep when possible.

- Wake for network access

- Enable Power Nap

These options are NOT enabled:

- Prevent computer from sleeping automatically when the display is off

- Start up automatically after a power failure.

This iMac would activate screen saver and sleep settings per my system preference pane settings just fine when I was running Yosemite.  Per Apple OS Help, I would think I have it set OK, but suggestions as to what I might be doing incorrectly would be most welcomed.

Thanks in advance.

最後更新：2017-10-16 01:56:51

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