No Sleep

[JCage]

Anyone having an issue with iMac dimming, entering sleep mode then waking up after a second or two? Seems like this happened after the latest Big Sur update but I can't be sure. I use logitech MX Keys and mouse for Mac but they are connected by the dongle, not blue tooth. For the life of me I can't figure out what is keeping it from sleep mode. Thanks.

 

[buckrock]

Does the Terminal command: pmset sleepnow work? It should go to sleep instantly after a return.

 

[chscag]

Have you tried resetting the SMC? Sleep/Wake is a power function controlled by the SMC. Resetting the SMC on an iMac is easy, just follow Apple's instructions:

How to reset the SMC on Mac desktop computers

1. Choose Apple menu > Shut Down and wait for your Mac to shut down.
2. Unplug the power cord.
3. Wait 15 seconds.
4. Plug the power cord back in.
5. Wait 5 seconds, then press the power button again to turn on your Mac.

 

[JCage]

Still not sleeping properly. Tries the SMC. Very strange. 2020 iMac 27inch latest iOS.

 

[JCage]

This is a Logitech issue. Logitech has a beta Options + and it is the culprit. Once I deleted the beta and reinstalled the old Logitech Options, problem went away.