mac OS Mojave Won't Sleep

Hello All!

I've had the issue when I upgraded to Mojave on my work computer and then I began having the issue when I purchased my New Mac Mini just this December.

I found what was MY problem and I suggest everyone might check the same thing....

I had a 3rd party usb type-c extender hub to extend to a vga input, usb input, and c input.... It was this off-brand that was the culprit. After about an hour of trial and error unplugging each peripheral, I found that the extender I had my Apple External Superdrive plugged into was somehow waking it back up after 3 seconds. Once I removed that extender and plugged my Superdrive directly into the Mac Mini and sent it to sleep, it worked; went to sleep and stayed asleep until I touched the keyboard to wake it back up again after about 30 minutes.

I ran out and bought Apple recommended extenders to replace the previous ones I had both at home and for work.

Long story short: check your previous or new 3rd party extenders - Mojave may just not like them; ergo, they may not be optimized for Mojave. Use either Apple brand or other brands recommended from Apple's accessories lists; worth the extra bucks.

Hope this helps some folks.

Hello All!

I've had the issue when I upgraded to Mojave on my work computer and then I began having the issue when I purchased my New Mac Mini just this December.

I found what was MY problem and I suggest everyone might check the same thing....

I had a 3rd party usb type-c extender hub to extend to a vga input, usb input, and c input.... It was this off-brand that was the culprit. After about an hour of trial and error unplugging each peripheral, I found that the extender I had my Apple External Superdrive plugged into was somehow waking it back up after 3 seconds. Once I removed that extender and plugged my Superdrive directly into the Mac Mini and sent it to sleep, it worked; went to sleep and stayed asleep until I touched the keyboard to wake it back up again after about 30 minutes.

I ran out and bought Apple recommended extenders to replace the previous ones I had both at home and for work.

Long story short: check your previous or new 3rd party extenders - Mojave may just not like them; ergo, they may not be optimized for Mojave. Use either Apple brand or other brands recommended from Apple's accessories lists; worth the extra bucks.

Hope this helps some folks.

....ooops... sorry for the extra post.

I had the same problem immediately after installing Mojave.

The problem is now solved by replacing my wireless keyboard by a wired one.

It was the last thing I tried, and it worked.

I had expected that it would be my Logitech wireless mouse, but it was the wireless original Apple keyboard.

A bit late to this thread, but wanted to share how I solved the same problem... after upgrading to Mojave from High Sierra yesterday, I notice fan was on and in fact my 2012 MBP would not go to sleep by closing the lid or selecting sleep from the apple menu (the screen would go to sleep and then immediately come on again). Contacted Apple Care, after quite some time on the phone checking Activity Monitor, resetting SMC and PRAM having not solved the problem, we noticed that in System Preferences: Sharing, the Screen Sharing box was ticked to on. After unticking, ie switching screen sharing to off, the problem was resolved and the computer now sleeps. The Apple Care representative was surprised by this, said he had learnt something new! There didn’t seem to be any info as to this solution in the knowledge base. It seems there is no one fix for this problem but hope this may solve some people’s issue

I did an SMC reset and that fixed the problem.

Click here for how to do an SMC reset

I was experiencing the same thing, the session would lock, but the screen would not sleep. Mine is a Mac Pro with two monitors, an Apple LED Cinema Display and a Thunderbolt Display. My USB keyboard was connected through the Cinema Display. Setting the display sleep as low as it could go and selecting "Lock Screen" from the Apple menu would lock the screen, and after a short time (30 seconds, maybe a minute) it would try to turn off the two displays then immediately turn them back on. Every 30 seconds or so it would repeat the cycle.

Moving the keyboard from the Cinema Display to the Mac Pro itself resolved the problem for me. Apparently, something in the display sleep triggered a USB event that the keyboard responded to, and the Mac would interpret the keyboard's response as a wake-up.

I don't know if the USB in your iMac is wired as part of the Mac or part of the display. That is, is the iMac essentially a USB-enabled display with a Mac attached to it, or a USB Mac with a display attached to it? Experimenting with what is plugged in to the iMac may help. It may not give you the resolution you're looking for, but maybe you can pinpoint the cause.

There is an app called Wimoweh that helps manage sleep, can block sleep itself if it sees certain processes running, or if the CPU load is over a certain amount, and can set a sleep timer. More importantly, it will list all the processes that are preventing sleep and say why sleep is prevented. The hidd process shows up in my Wimoweh display with an assertion type of "UserIsActive." When you stop using the keyboard and mouse for a while, the hidd process should release the assertion. It's presence in Activity Monitor is normal.

My Mac mini sleep problem started when I upgraded to 10.14.4. It would not sleep, ever. I tried without success, almost everything suggested in this thread and others. Then, I remembered something from previous versions of Mac OS. The slider will not allow Computer Sleep before Screen Sleep.

Assertions in Terminal.app verify my Screen Sleep setting of 10 minutes (600 seconds).

mini:~ earl$ pmset -g assertions

2019-04-24 10:50:49 -0400

Assertion status system-wide:

.....zero items snipped.....

UserIsActive 1

.....zero items snipped.....

Listed by owning process:

pid 112(hidd): [0x00001f1f00098576] 00:00:00 UserIsActive named: "com.apple.iohideventsystem.queue.tickle.4294969512.3"

Timeout will fire in 600 secs Action=TimeoutActionRelease

.....remaining lines snipped.....

But, Mojave has no slider for Computer Sleep. What is the setting and how is it changed?

I checked the current Computer Sleep setting. This was the problem.

mini:~ earl$ sudo systemsetup -getcomputersleep

Computer Sleep: after 1 minutes

I changed the Computer Sleep setting to 15 minutes. The range of allowable values is 0-100.

mini:~ earl$ sudo systemsetup -setcomputersleep 15

setcomputersleep: 15

I verified the new setting.

mini:~ earl$ sudo systemsetup -getcomputersleep

Computer Sleep: after 15 minutes

Problem solved, at least for me. This fixed both Automatic Sleep and Manual Sleep.

Automatic Sleep.

Screen Saver - 5 minutes

Screen Sleep - 10 minutes

Computer Sleep - 15 minutes

Manual Sleep.

Screen Sleep - immediately

Computer Sleep - about 1 minute

Now, I have to turn on all the stuff I turned off in search of a solution.

I also had this issue after updating my Mac to Mojave OS. I just now updated to the latest 10.14.2 version and the issue seems to be fixed.

Until yesterday I had same problem with my 6 month old Mac with Mojave 10.14.2 solved my no sleep issue by uncheking ALL the boxes in System settings-energy saver & putting the slider on 1 minute. I guess later I can try to check one box at a time and

see if it will still sleep automatically

The process hidd is the Human Interface Device Daemon. It is required for your Mac to operate properly. It controls mouse, trackpad, keyboard. I'm not sure why it is listed under Preventing Sleep.

Sleep issues are some of the most difficult to troubleshoot. Here's what Apple has to say:

If your Mac doesn't sleep or wake when expected - Apple Support

FWIW, I gave up on the Sleep function years ago. Ever since the inception of OS X there have been Sleep related issues. And even more lately. I just use Display Sleep and keep it set for 15 minutes so I'm not burning the screen. That way your Mac uses very little power over Sleep and is ready to use at the touch of a key without any grogginess. UNIX based systems were made to be always on and they’ve been running busy servers 24/7 for decades.

Sorry to hear that. I assume you tried a PRAM reset also?

I ran Activity Monitor and discovered under energy that just having QuickTime open prevented my iMac from sleeping.

I've been having this issue, where if I walk away from my 2017 15" MBP unplugged, it dies overnight every night.

Just found this setting in "energy saver settings", could this be causing it to not go into deep sleep mode with the screen open?

p.s. I've had this checked until a few minutes ago. so we'll see what happens