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RKC 09-23-2012 10:10 PM

Need help with Kernel Panic
I've been experiencing kernel panics the past couple weeks. Usually after I put my computer to sleep and try to wake it up again.

Other issues I've been having: apps running slow especially after long working sessions and with large files, computer won't wake up after it's sleeping (though it's hot and seems to be running), apps crashing (especially while trying to quit), other...

My question is, should I take my computer in for a check up? Or is this usually a disk issue and if so, should I just order a new HD and install it?

Thanks for any advice.

chscag 09-23-2012 10:15 PM

Which Mac do you have, year and model? Version of OS X it's running? And, is your Mac still under warranty?

RKC 09-23-2012 10:37 PM

It's a 27" iMac, 2.8 intel core i7, running 10.6.8, 8 GB ram (which is max). Not sure which year it is, maybe 2-3 years old.

chscag 09-24-2012 02:13 AM

Run a verify and repair on the hard drive using Disk Utility when booted from your Snow Leopard DVD. Let's check the hard drive and see if there are any problems with it before doing any other trouble shooting.

Kernel Panics are normally the result of hardware errors but can also be caused by software. The usual suspects are the hard drive and memory.

RKC 09-24-2012 12:19 PM

Damn, I'm having trouble finding my disks. Can I try using disk utility after a regular start up? Or should it be done from the start up disk?

I did find the disk for my laptop, macbook pro install DVD 10.5.7. Would that work?

chscag 09-24-2012 02:24 PM

No, you can't verify the hard drive while it's mounted. It has to be booted from the disk. And the disk for your MacBook Pro won't work because it will be unable to boot the iMac.

However, if you're comfortable using the single mode command line you can verify the hard drive on the iMac without the disk. Follow the directions given here: LINK

Let us know what the results are.

RKC 09-25-2012 03:06 PM

OK, I found the disk!

Ran Verify and it stopped saying that it needed to be repaired. Things in the list were:

Missing thread record (five of them in a row)
Incorrect number of thread records
Invalid volume file count
The corrupt and needs to be repaired

Ran the repair and it said - Successfully Repaired. Ran the Verify again and said things were ok.

So, does that mean it's good to go? Are those things what could have caused the Kernel Panic? The slowness? I'll update with how things are running in the next few days, hope things are better.

Thanks a bunch for the help!

RKC 09-25-2012 09:57 PM


I just got another kernel panic on start up. My computer was actually better over the past few days. Now since I ran the repair, I got this crash. And while starting up. I was happening after sleep mode, so this is different. After I forced shut down and start up again, it got stuck on a blue screen for a long time. I force restarted again and got a blue screen again but this time it finally started up.

Could I have made it worse? What to do at this point?

chscag 09-25-2012 10:04 PM

Run another check on the hard drive. Let's see what it says. If it passes, run the Apple Hardware Test in extended mode.

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