Machine crashing ... kind of

Question

Hi everyone,
I was having this problem a while back, but after removing some software which I thought was causing it, it has started to come back again.
The problem is that the iMac screen will suddenly freeze with either:
• a black and white striped patter.
• a white screen.
• a black screen.
I have to then force the computer to shutdown by holding the power button down, and then restart it.
I keep looking in to the console to try and find what might be causing it and I keep seeing this occurring, repeatedly, ever few seconds.
+09/08/2010 08:34:45 Suitcase Fusion[258] * -[NSConditionLock unlock]: lock (<NSConditionLock: 0x13992f70> '(null)') unlocked from thread which did not lock it+
+09/08/2010 08:34:45 Suitcase Fusion[258] * Break on _NSLockError() to debug.+
Is this the problem do you think? And if so, how do I cure it?
I have already done hardware tests which come up fine. I have run the disk utility from the DVD with no errors coming up. I have also re-set the PRAM. I can't think what else it might be.

Answer 1

HI,
09/08/2010 08:34:45 Suitcase Fusion258 * -NSConditionLock unlock: lock (<NSConditionLock: 0x13992f70> '(null)') unlocked from thread which did not lock it
Probably the third party font manager SuitcaseFusion.
Go here for troubleshooting duplicate or corrupted fonts.
http://reviews.cnet.com/8301-13727_7-10389716-263.html?tag=mncol;title
And use Font Finagler to empty font caches.
Third party font managers on a Mac can cause the performance issues you are experiencing. Better to let the Mac OS X FontBook do the job.
Carolyn