Mountain Lion won't sleep, shut down, restart, or log out.

For this issue - i perfom a complete clean install for all the disk.

With the recovery - format the disk next install a fresh Mountain Lion and all your application.

Fortunatly i have a backup of all my data. It takes me more than 24h to get my mac running with all the stuff.

Sorry - i have no other plan if the 'killing dock' does not work.

I have same problem here, except that mine sleeps but doesn't wake up. I upgraded my macbook pro from Snow Leopard to Mountain Lion. Everytime it goes into sleep mode, turning it back on is proving difficult. I have to hold the power button down for a very looooong time before it starts all over again (and by then all my working windows are gone-it was basically shut down)!

Same issue here with iMac 27". Can't believe that Apple is ignoring this with ML 10.8.2 now out. Help!

Me too,but now i fixed it

Try this.

1.Create new account and login with new account.

2.Now you can do everything fine Shutdown/Restart/everything in Apple menu work!! Then you can update OSX for fix this issue.

3.Go to Apple menu and clicks software update

4.Update for OSX Mountain Lion

5.Now everything OK.But every file ,setup ,Dock and document was in the old account right?

6.Restart and Login with your old account.

Hope it OK for everyone 🙂

Thanks for your Help, but I really didn't want to do the complete clean install- therefore I tried everthing.

I went to disk utility and Verified the Disk Permission and repaired it. It started to work again!

Hope this can fix the problem.

I have the same issue. Hoping that an update fix is on the way.

Same problem here. Came to this thread for ideas and tried the disk utility check disk permissions one. Disk utility found issues, I ran permissions repair and all now seems to be fine. Fingers crossed it lasts!

Now I just need to find a working solution to the Time Machine/Time Capsule issue that has plagued me since updating to ML...

Thanks a million for presenting the solution. Everything is working just perfectly now 🙂

hifidk wrote:

Had the same problem and this worked for me:

Try deleting following two items:

~/Library/Preferences/com.apple.dock.plist

~/Library/Preferences/com.apple.dock.db

Make sure you take a screenshot of your current dock since deleting these files will reset your dock to default.

Now open terminal and do a sudo reboot w/ your password.

This solved the problem for me.

Hello

I tried to follow those instructions but on my Mac Mini i can't find the file com.apple.dock.db.(how do i find it?)

Deleting com.apple.dock.plist allowed my mac to shut down correctly for about 5 times, then the issue came back. i Deleted the Plist again and worked...then came back...

May this be related to the fact i cant find and delete the other file?

I'm having the same problem. I managed to find the first file, which is the .plist one with terminal (open .) but i cant delete the file. I tried everything including rm -rf ./* but it didnt work. I've notice that theres another file named com.apple.dock.plist.lockfile , is it somehow related to this? Thanks in advance

Have you try with sudo?

sudo rm -rf ./*

Thank you for this fix hifidk

--

I still very surprised that the 2 preference files for the Dock can do so much damage !

How come that this Docs pref can stop computers to wake?!

How come that Apple didn't introduced a fix…?

i cant find the com.apple.dock.db

only *.plist...

dleting this file lets me shut down my mac correctly a few times but then the problem come back....

I have the same problem and tried to perform your solution but i don't have the dock.db. Only the dock.plist Any suggestions? Thanks

Just upgraded from Snow Leopard to Mountain Lion on a mid 2009 13 inch (white body) and ran into the same sllep issue. The machine would sleep withthe lid closed without the AC adapter but would keep spinning with AC. Just to make things more interesting, if the lid was closed and I discionnected the AC it wuld go into sleep mode and stay there even after I reconnected the AC.

I tried several of the suggestions here -- using terminal command, pulling batery & resetting SMC, adjusting eneery saving settings & screensave. The issue remaind unresolved.

What finally worked after all of that, was running repair permissions and restarting the machine. Too simple!