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

Thank you so much! It really works!

Yeah, this worked! Thanks so much!

Just wanted to add that I had to delete those files twice, i.e. delete them, restart, nothing happened, delete them again, then it worked.

I also had to do this procedure twice (second time only com.apple.dock.plist had to be deleted - but then...

it worked 🙂

Thank you for your help ➕

I got this problem too and tried to delete these 2 items

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

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

but the com.apple.dock.plist keep going back to the folder after deleting.

is there any solution for this?

been doing this method for more than 10 times but juz cant delete the plist.

@skyinthesea - Try open "Terminal" and enter "killAll Dock"... and then delete the files.

@skyinthesea Also, note that plist will be re-created automatically once you delete it and reboot. It is normal to see it there when you reboot.

Thanks! it fixed the problem!

i did the same thing deleted com.apple.dock.plist and did sudo reboot but that did not helped me

after clicking shutdown grey screen appears and freezes but cursor is mooving

if any body solved this problem plz help me

@varun - You'll still have to force reboot the first time (holding down the power button). This only fixes the problem after doing it, and restarting the machine.

Here's my experience while I was doing it. Don't throw it to the trash, drag the plist to your desktop instead. Notice that you have to make sure the plist is not in the folder when you reboot. Because if it's still there, the OS simply recreates the same plist you're throwing away. That's not helping. As the OS reboots, it detects there is no plist in the folder, so it creates a new one (default). And the problem is solved.

i did what you said instead of deleting the plist file i placed it on my desktop after placing it on my desktop i clicked shutdown button but nothing happened so i pressed power button after switching on my imac i went to preferences folder and apple.dock.plist file again appears

even after deleting the file it again appears

i dont know what to do because i dont have lion to switch back to lion os

After deleting/moving plist file, try not to reboot with shutdown button or power button. Open up a terminal and do a sudo reboot (type in "sudo reboot"). After rebooting, apple.dock.plist file will be regenerated so it is normal to see it in the folder. If you did this and did not solve the problem, then I don't know how you would fix it.

i am doing reboot by terminal only as you said

shall i format my system with fresh copy because i just updated my system to lion to mountain lion?

your case almost same like mine. try do merge these 2 steps

what i did is deleting this 2 files (dont clear the trash bin first)

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

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

then go "Terminal" and enter "killAll Dock".

You will see the dock list got refreshed back to default.

last, go "Terminal" and "sudo reboot"

This worked for me.