iMac 27" 5k doesn't sleep (fan stays on)

[notmetoday]

So whenever I tell it to go to sleep the screen will fade to black, and everything seems to stop, like music, videos etc, but I can feel the fan running (nearly silent, but warm air does keep coming out, all the time).

Figured it might be Power nap, turned it off, but didn't seem to make a difference.

Just wondering if anyone else is experiencing this, or if this is normal behaviour (e.g. a workaround they put in for all the death sleep issues this iMac used to have)?

For what it's worth, it wakes up really quick, compared to when it was new and it would take a second.

I should also note that I use both a Bluetooth keyboard and mouse (nothing wired), maybe it's staying on monitoring for a wake command from them?

Running macOS 10.12.1 on 2014 5k iMac (first gen 5k iMac)

Edit:
Hmm, just found this post, seems it was an issue with some of the first gen iMac 5K's, guess I'll have to live with it now since mine is definitly out of it's 1 year warranty now

 

[MetalCores]

So whenever I tell it to go to sleep the screen will fade to black, and everything seems to stop, like music, videos etc, but I can feel the fan running (nearly silent, but warm air does keep coming out, all the time).

Figured it might be Power nap, turned it off, but didn't seem to make a difference.

Just wondering if anyone else is experiencing this, or if this is normal behaviour (e.g. a workaround they put in for all the death sleep issues this iMac used to have)?

For what it's worth, it wakes up really quick, compared to when it was new and it would take a second.

I should also note that I use both a Bluetooth keyboard and mouse (nothing wired), maybe it's staying on monitoring for a wake command from them?

Running macOS 10.12.1 on 2014 5k iMac (first gen 5k iMac)

Edit:
Hmm, just found this post, seems it was an issue with some of the first gen iMac 5K's, guess I'll have to live with it now since mine is definitly out of it's 1 year warranty now

Give Apple a call. Sometimes they will help you out and take care of things even when its out of warranty. Doesn't hurt to try!

 

[notmetoday]

That's true, I've heard good things about their support, though I don't have any official Apple stores here (New Zealand), but will give it a go, thanks!

 

[macmee]

I just fixed this problem myself. You can run this command in terminal to see why your device is being woken up:

syslog |grep -i "Wake reason"

In my case when the device was supposed to be asleep, this "Wake reason: XHC1" kept firing every minute or so. I googled XHC1 and people claimed it meant a device plugged into the imac was waking it. By process of elimination I turned everything off one by one, bluetooth, my external hd, and unplugged monitors. Turns out my mini display to HDMI adaptor (which is an official apple one lmao) was causing the imac to never go to sleep when it was plugged in.

So you should run ^ that command after letting your computer "sleep" for about 10 minutes, and then report back with what the repeated wake reason is.

 

[notmetoday]

I was just in Windows (dual boot) and when I sleep in there the fan goes off, so must of a software thing.

I just tried the command and it returns nothing (just after doing a sleep on macOS).
Will look into this log command, see if the logs are there.

iMac:~ user$ syslog | grep -i "Wake reason"
NOTE:  Most system logs have moved to a new logging system.  See log(1) for more information.

I also just unplugged everything (only power cord in) and the fan was still running during sleep.

Edit:
Just tried this > syslog | grep -i "Wake" < and it returned a bunch of chrome things

Nov 30 09:00:41 iMac spindump[301] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-11-30-090041_iMac.wakeups_resource.diag
Nov 30 09:24:08 iMac spindump[301] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-11-30-092408_iMac.wakeups_resource.diag
Nov 30 11:45:49 iMac spindump[301] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-11-30-114549_iMac.wakeups_resource.diag
Nov 30 12:49:49 iMac spindump[301] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-11-30-124949_iMac.wakeups_resource.diag
Nov 30 19:03:51 iMac spindump[301] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-11-30-190351_iMac.wakeups_resource.diag
Dec  1 07:12:08 iMac spindump[301] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-01-071208_iMac.wakeups_resource.diag
Dec  2 23:41:12 iMac spindump[305] <Notice>: Saved wakeups_resource.diag report for WindowServer version ??? (???) to /Library/Logs/DiagnosticReports/WindowServer_2016-12-02-234112_iMac.wakeups_resource.diag
Dec  3 22:12:11 iMac spindump[305] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-03-221211_iMac.wakeups_resource.diag
Dec  4 18:48:17 iMac spindump[305] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-04-184817_iMac.wakeups_resource.diag
Dec  5 19:08:43 iMac spindump[305] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-05-190843_iMac.wakeups_resource.diag
Dec  5 21:33:18 iMac spindump[305] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-05-213318_iMac.wakeups_resource.diag
Dec  6 16:18:25 iMac spindump[305] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-06-161825_iMac.wakeups_resource.diag
Dec  6 17:21:38 iMac spindump[293] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-06-172138_iMac.wakeups_resource.diag
Dec  6 19:13:42 iMac spindump[293] <Notice>: Saved wakeups_resource.diag report for Google Chrome Helper version 54.0.2840.98 (2840.98) to /Library/Logs/DiagnosticReports/Google Chrome Helper_2016-12-06-191342_iMac.wakeups_resource.diag

But I don't think this is the issue, I quit everything and it still kept the fan on.

Also these are the settings for "Energy Saver"

Thanks for the sugestions though!

 

[macmee]

did you disable bluetooth and wifi as well and then try sleeping?

 

[notmetoday]

did you disable bluetooth and wifi as well and then try sleeping?

No I didn't, just tried disabling the Bluetooth and then put it to sleep and the fan went off!
Then I couldn't login anymore, since everything was Bluetooth (except my mouse), and the Bluetooth wizard that's meant to show up at boot when nothing is connected didn't even though it's enabled, so had to hunt down a USB keyboard.

But now when I disable the Bluetooth and put it to sleep the fan stays on again so...

I've also unselected "Allow Bluetooth devices to wake this computer", but it doesn't seem to have any effect, I can still wake the iMac with my Bluetooth keyboard.

Think I'll do a clean install soon, see if this helps before calling Apple.