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My iMac will not wake up from sleep mode after upgrading to Yosemite. I must force shutdown with power button, then on restart, I get grey progress bar screens X2, then it boots up normally.
Can anyone help or give insight?
Thank you!
iMac, OS X Yosemite (10.10), Mid 2011 27"; 2.7GHz Quad i5 12GB mem 1TB
ISSUE UPDATE: I also get the grey progress bar screen at normal start up from a shut down condition...Any help???...Thanks!
Well, some things that come to my mind, You can try the safe boot mode.
OS X: What is Safe Boot, Safe Mode?
Or read this:
Mac OS X: Gray screen appears during startup
Or
Mac OS X: Why your Mac might not sleep or stay in sleep mode
Sungyub Han...
Thank you for the reply. I looked into those things you suggested. My SysInfo showed me in a normal boot mode. I did do a safe mode boot, verified that, then shut down and rebooted in normal mode. I still got the grey screen + progress bar at start up, checked Sys.Info. and it showed normal boot mode.
I read the Apple Support section on "Mac OS X Gray Screen Appears At Startup", and none of those examples mentioned is happening in my case.
Thank anyway!
Hi, i was wondering if anyone found a solution to this strange behaviour yet?
My iMac (late 2012) won't wake up from sleep either... Only way to wake it is by hard-resetting it by pushing the power-button for 10 seconds...
Really annoying since Yosemite.
Can someone help?
Mine seems to have stopped doing that. The only thing I have done is to do an intentional boot up in SafeMode. That may or may not help, but you can give it a try. Just do a search for OS X What is safe boot, safe mode?
Thank you very much your response!
I will give it a try. Hopefully this works for me as well!
I have the same problem with my iMac 27" (Mid 2011, i7, 8GB RAM, AMD 6970/1G). Sometimes not waking up (black screen).
OS X Yosemite: Start up in safe mode
Starting up in safe mode may help you diagnose problems you’re having with your Mac.
in the Help window, then choose Print. To leave safe mode, restart your Mac again, but don’t hold down any keys during startup.
Last Modified: Oct 21, 2014
Intentionally booting into safe mode didn't resolve my problem.
But unplugging all my USB ports before going to sleep has... Weird, but it works for me.
Hi Shino, I have this same issue and cannot solve. Were you using a 3rd party keyboard and/or mouse? I am using a 3rd party keyboard, so perhaps this has something to do with it? I have a new iMac, brand new, the only software I installed was Little Snitch and USB Overdrive, both of which I have disabled and still see this issue. I also see this in the logs:
requested push wake but lacks APSPushWakeEntitlement
Hey prohtex, no i'm using both the apple wireless keyboard and mouse.
Did you find a solution yet?
No, I have not found a solution. I just disabled sleep or screensaver so the iMac sits there on all the time. VERY frustrating as this is a new iMac with clean install of Yosemite. I will try the USB unplug solution but that doesn't seem like much of a fix. Hoping 10.10.1 will resolve this.
So sorry to hear... You said your iMac is 'new', so maybe you can still take it back to the apple store?
For me unplugging all usb ports before putting it to sleep has helped... Also putting it to sleep from the apple menu, not by putting it to sleep by the keyboard shortcut...
I am having this problem too on an Mac (27-inch, Mid 2011) with Yosemite 10.10.1. It was happening before the upgrade to 10.10.1 also.
I would say about once every 4 or 5 "wake from sleep" events leads to a blank screen. I can tell the iMac is up and running (I can hear the disk spinning) but I can't see anything, so I am forced to force a reboot. The iMac is being woken from sleep by me hitting the keys on the keyboard. It has always been put to sleep by me manually using the Apple menu.
I have tried unplugging my USB fitbit dongle before putting the iMac to sleep - this has not helped. I thought it had helped after maybe 7 successful "wake from sleeps" in a row, but then today it happened again.
By the way, I have a full size Apple keyboard which I have not tried unplugging also.
I also have a Thunderbolt Promise array plugged into this iMac and powered up at all times.
This event appears in the Console every time this problem occurs:
11/22/14 4:38:30.392 PM apsd[51]: Attempt to set push wake topics without dark wake enabled: ()
For example, the above message appears 4 times in my logs the last time my iMac failed to turn the screen on after waking from sleep.
Really was hoping the last Yosemite update would fix this defect as it is incredibly frustrating to force reboot my iMac over and over, and deal with the iPhoto library needing repairs over and over, and potentially other issues.
iMac not waking up from sleep after Yosemite upgrade
