my iMac will not stay asleep. Its been this way for about a month

[justdeemarie]

please help.My iMac (2011 running 10.12.6)
will not stay asleep. Not when it goes asleep itself, not using a hot corner, not using the command under the apple. it goes black and then wakes within about 30 seconds to 1 minute. I have to shut down completely and its so annoying. Ivbe tried all the basics, reseting energy settings, unchecked blue tooth, unclicked wake for network and stuff. Help its so annoying !)
thanks in advance
Dee

 

[Feenician]

please help.My iMac (2011 running 10.12.6)
will not stay asleep. Not when it goes asleep itself, not using a hot corner, not using the command under the apple. it goes black and then wakes within about 30 seconds to 1 minute. I have to shut down completely and its so annoying. Ivbe tried all the basics, reseting energy settings, unchecked blue tooth, unclicked wake for network and stuff. Help its so annoying !)
thanks in advance
Dee

Usually it's some software you have waking it back up.

However this is the wrong section of the board. Try posting here https://forums.macrumors.com/forums/macos-sierra-10-12.195/ and you might get some help. Good luck.

 

[EugW]

Do you have any external devices connected? If yes, unplug them and see what happens.

If worse comes to worst, you may have to consider doing a clean install, as it could be a wayward piece of software/service.

 

[cb3]

I wonder if "Wake for network access" is check in the energy saver/sleep control panel? Or something like this.
Would this wake up a machine?

 

[EugW]

I wonder if "Wake for network access" is check in the energy saver/sleep control panel? Or something like this.
Would this wake up a machine?

S/he already said it's unchecked.

 

[MC6800]

Each time your machine awakes, it puts a message in the Console with the reason. Here's an article explaining how to see and interpret it.

 

[signuphere]

I'm in the same boat with my mid '11. I've researched it to death and even put in a new hard drive (took advantage of the situation to upgrade to an SSD). It still does it. It boots up in 15 seconds now with the SSD so not really a big deal but it is galling that a new hard drive didn't fix it.

 

[Fishrrman]

My suggestions will be different from everyone else's.

At night, power it down -- all the way off.
Problem solved.

During the day, don't bother with "putting it to sleep" in the full sense of the word "sleep".
Instead, just set a "hot corner" that puts the display to sleep, makes it go dark.
Leave the rest of the OS running, and walk away.
It will cost only a few pennies in electricity.
If the OS decides to sleep, it will sleep.
Otherwise, the display will be off -- you don't want burn-in.

Personal experience:
I have a late-2012 Mini.
When I'm going to be away from the computer, I just reach and turn the display OFF.
I don't even touch the Mini.
When I come back to it, I switch the display back ON.
Works for me.

 

[MC6800]

Curious: did anyone try my suggestion in post #6?

 

[signuphere]

Curious: did anyone try my suggestion in post #6?

Sure, the culprits are HID and DisplayWrangler in my case. I understand what HID is (Human Interface Device) but have no idea about the other one even after Googling it like crazy.

 

[MC6800]

Sure, the culprits are HID and DisplayWrangler in my case. I understand what HID is (Human Interface Device) but have no idea about the other one even after Googling it like crazy.

Another article which discusses this.

A common suggestion is to try pasting the command

pmset -g assertions

into Terminal to see which application may be the culprit. Look in particular if "PreventUserIdleSystemSleep" is in the "1" state, and if there are applications listed in the "Listed by owning process" section. The last line there may be "Idle sleep preventers: IODisplayWrangler", which you can ignore-- it shows on my MBP which sleeps soundly.
[doublepost=1510198247][/doublepost]

Sure, the culprits are HID and DisplayWrangler in my case. I understand what HID is (Human Interface Device) but have no idea about the other one even after Googling it like crazy.

The "hidd" process would be the mouse and keyboard, but when my MBP is woken by the Logitech wireless mouse moving, the console line reporting this is "Wake reason: EHC1". What does your "Wake reason" line show?