El Capitan Frozen After Sleep

10.11.6 El Capitan Retina 5K, 27-inch, Late 2014 iMac here, same problem, frozen out of sleep, keyboard and mouse don't work.

However 3 days later the iMac once again failed to wake up. Slightly different in that there was nothing visible on the screen although the power light had changed from amber to blue which indicates it had received a signal on the HDMI.

Back to screen saver only and scratching of head.

So...I’ve gone through 3 Mac Mini’s in the past month in a half. First one had the regular stock hard drive…the sleep bug never happened. I gave up on that machine before my 14 days because it wasn’t powerful enough. So then I got one with a Fusion drive. The bug kicked in. I read on here that it might be related to the Fusion drive so I returned that one and got a Mac with a Flash drive. I have only had it one night but I checked this morning before I left from work, and BAM! It wasn’t frozen. I’ll post more after a few days. I think it is the Fusion drive if I had to guess.

I'm afraid I have to confirm that 10.11.6 does NOT solve the problem for me.

iMac (27-inch, late 2012, no fusion drive) : system still does not wake up after sleep. The problem started after the 10.11.5 upgrade.

I don't think you understand this thread. It is not about the computer waking up from sleeping, it is about the computer waking up from sleep after an extended period of time and freezing. In turn, having to completely power down and reboot.

same here

Well, that is exactly what I mean. No problem when sleeping for a short period of time. But after, let's say, one night, it is frozen, even with 10.11.6.

I've had this issue ever since upgrading from Yosemite to El Capitan 10.11.5 on my iMac 21.5" late 2012.

My hard drive is on "never sleep" (have to keep it up - linked to video surveillance) and the passworded screen sleep set on 3 minutes or so.

The Mac would work fine until wanting to wake it up... the blue screen with the password window appeared, let me key in my password, dimmed right away and... the spinning color wheel appeared ... with it the freeze ! The freeze occurred totally randomly but at least once or twice in a 24 hours period.

Restarted it each time using the power button to force quit and restart.

Read many forums and proposed solutions, applied some (including setting hibernation to OFF) updated to OS X 10.11.6, tried and tested for the past 3-4 weeks with no results. I even reinstalled Mac OS X 10.11.6 ...all this didn't help until... until I decided to switched off TimeMachine (enter TM preferences and slide the switch from YES to to NO).

Strangely enough this did the trick for me. After two days of no issue, I switched "ON" TM again to test and the freeze on wake issue started again within hours. Switched OFF again and all was fine !

No alert whatsoever from TM on a possible malfunction during all that time. I am backing up on my Sinology and back ups record just fine.

Until the next OS X update I'll just have to manually switch on and off TM to perform backups. Not ideal but this'll do for now.

Very interesting! My problem ended as soon as I upgraded to 10.11.6. But if it is Time Machine, perhaps you can reinstall it. Also, you should probably notify Apple because it could be a glitch they are unaware of that they can repair for their next update.

BTW, rather than turn Time Machine off and only turning it on when you feel the need to backup, I think I would do it the other way around. I would always leave it on when I was using the computer, but would only then switch it off when I plan to put it to sleep, at least until you can get it fixed. That way you don't miss backing up important data as you work.

Hi Nicolas, your explanation seems to work indeed ! I didn't realize it at first, but last week I disconnected my external HD (used by Time Machine) because I needed it on another machine. After reading your post I suddenly realized that the freezing problem did not appear since I disconnected the Time Machine HD.

So, it seems to be Time Machine related indeed !

I've had 10.11.6 in my machine for a while now and the problem still persist. I don't think this update fixed the problem

ok I'm at the end of this 14 page thread and no resolution to this problem. I've seen lots of superstitious suggestions but no definitive resolution. Is Apple aware of this? They should be embarrassed. Anybody?

So for me, the 10.11.6 update partially repaired the issue. Usually, it wakes fine and I do have a nearly standard sleep/hibernate scheme again. I had one instance (maybe two at most) when the same freeze up happened after opening the lid and logging in- the screen restored and began freezing up as soon as I tried the first thing, just like before.

I have El Capitan on my laptop and desktop. The desktop is hooked up to Time Machine but I only turn Time Machine on for the laptop when I want to back things up. Never an issue with the laptop but even with the latest upgrade to 10.11.6 I still had sleep problems with the desktop. Turned Time Machine off on the desktop and have not had an issue since so this most definitely worked for me.

My experience is a consistent freeze of the trackpad/cursor "every" time

the laptop goes to sleep for more than say 20 minutes with 10.11.6. We have

another Mac in the house that behaves the way you've described with 10.11.6

but not mine...which is interesting because mine is the newer machine 😟

On Tue, Aug 23, 2016 at 7:43 AM, Apple Support Communities Updates <