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Old Nov 12, 2010, 08:49 AM   #1
film916
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iMac won't shut down or logout users

I often have an issue where my iMac won't shut down, restart or logout users. Basically, when I click Shut Down or Restart, the desktop icons disappear as if the computer's getting ready to shut down (the desktop wallpaper remains) and it just sits there and won't shut down. I have to hold down the power button on the back of the computer in order to get the computer to shut off. This often happens when I try to logout a user. I'd say this happens about 2/3 to 3/4 of my attempts to shut down or logout a user. Any ideas?
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Old Nov 12, 2010, 08:56 AM   #2
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Reset SMC and PRAM and run Disk Utility
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Old Nov 12, 2010, 08:57 AM   #3
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restart holding command+V and it will boot in verbose mode. then shutdown or logout and verbose mode will also show. what does it get stuck on?
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Old Nov 12, 2010, 09:02 AM   #4
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Quote:
Originally Posted by Hellhammer View Post
Reset SMC and PRAM and run Disk Utility
First, thanks for the replies, but you're kinda speaking a new language to me. How to I reset SMC and PRAM, and what should I run in Disk Utility?

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Originally Posted by richthomas View Post
restart holding command+V and it will boot in verbose mode. then shutdown or logout and verbose mode will also show. what does it get stuck on?
I don't think I've ever booted in verbose mode. What should I look for when I shutdown?
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Old Nov 12, 2010, 09:44 AM   #5
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no need to reset the PRAM (actually NVRAM in Intel Macs) as it just holds the speaker volume, screen res and startup disk info. do try an SMC reset tho http://support.apple.com/kb/ht3964

if it shows verbose info before restarting, might not as you said it stalls at the wallpaper (not at the blue screen), it will stall at a line and try and remember what stalled it or write down the whole line.
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Old Nov 12, 2010, 10:37 AM   #6
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Quote:
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what should I run in Disk Utility?
Repair permissions and verify the disk.
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Old Nov 12, 2010, 11:56 AM   #7
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Quote:
Originally Posted by richthomas View Post
no need to reset the PRAM (actually NVRAM in Intel Macs) as it just holds the speaker volume, screen res and startup disk info. do try an SMC reset tho http://support.apple.com/kb/ht3964

if it shows verbose info before restarting, might not as you said it stalls at the wallpaper (not at the blue screen), it will stall at a line and try and remember what stalled it or write down the whole line.
Thanks, guys... I'll give this a shot and let you know what happens.
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