iMac does not shut down nor Restart

Question

iMac does not shut down nor Restart

Hello Community,

since several months I have a problem with my iMac running on OS X Lion. The computer does not shut down!!! When trying this, it seems to work normal until the grey screen appears with the rotating circle in the middle. This status remains and remains and remains and remains...... The only thing to shut the computer down is then the "hardware shut down" by the power switch. Certainly not menat to be. The strange thing is, that even a Restart after software updates does not run through as it should, it also is hanging at this point....

I have tried almost everything which I could find on user boards: SMC reset, harddisk repair, even OS X Lion reinstallation - nothing solved the issue.

Anybody around here with a brilliant idea?

Thanks...

Gerhard

iMac, Mac OS X (10.6.8)

Posted on Mar 4, 2012 3:42 AM

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Answer 1

Mar 4, 2012 4:42 AM in response to gerhardfromtiefenbach

Hello:

An SMC reset frequently corrects that type of problem. However, since you have already done that, try resetting the PRAM.

Barry

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Answer 2

Mar 4, 2012 9:18 AM in response to Barry Hemphill

Hello Barry,

thank you. Just tried it out, but did not solve the problem. Any other idea? Just for info: when starting my iMac in "Safe Mode" it will shut down normally. Any idea on that?

Thanks and regards

Gerhard

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Answer 3

Mar 4, 2012 9:32 AM in response to gerhardfromtiefenbach

Hi:

That would indicate that something is wrong with your main account - possibly a preference file. Take a look at the preference files and see if one jumps out. Unfortunately I would be guessing if I pointed you and anything specific.

FYI..... Preferences files are rebuilt automatically by OS X with default values as needed.

Barry

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Answer 4

Mar 5, 2012 12:01 AM in response to Barry Hemphill

Hi Barry,

could you indicate what you mean by ""...and see if one jumps out" ?? To me they look all more or less same, at least in structure...

Thanks, Gerhard

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Answer 5

Mar 5, 2012 4:38 AM in response to gerhardfromtiefenbach

Hi:

I am away from home and my iMac, so I cannot point you to specific plists.

Barry

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Answer 6

jas0nyan

Level 1

10 points

Mar 6, 2012 2:16 AM in response to gerhardfromtiefenbach

I have same problem with my MacBook Pro.

Maybe it is caused by iCloud or iTunes (iTunesHelper) ?

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Answer 7

Mar 6, 2012 3:36 AM in response to jas0nyan

jas0nyan wrote:

I have same problem with my MacBook Pro.

Maybe it is caused by iCloud or iTunes (iTunesHelper) ?

I do not think it is an iCloud issue, the problem started long before iCloud. iTunesHelper? I don't know, not using it. And my MacBook still behaves as it should. The only difference was a test version of Kaspersky AntiVirus for Mac, which I installed on my iMac. Right after that the iMac started stalling on shutdown. After a couple of days I removed ths SW again, and by using TrashMe I think it is gone 100%. But the problem persists....

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