iMac freezes

a brody's opinion about OnyX is just that -- his opinion.

Many of us disagree, and have no connection with it at all, except as long-time satisfied users.

a brody's opinion about OnyX is just that -- his opinion.

Many of us disagree, and have no connection with it at all, except as long-time satisfied users.

Yes I know.I just wanted to get another view point and normally take Kappy's advice seriously due to his track record.

BTW I have successfully been using OnyX for a couple of years now.

Thanks for your feedback.

Roger

still no progress on my end. But I can at least work around the problem by keeping my computer loaded up with sufficient work. It seems to stay up no problem as long as I don't let the cpu idle too much 🙂

I don't really know much about the internals of the core i7 or i5 (or of any cpu actually) but wondering if it might try to shut down any cores or anything if its not doing much work? Could something like that potentially cause lock ups?

I just did some research on the core i7 and found the following info

"They become energy efficient to the point of shutting down processing cores or reducing power consumption to provide performance when people need it, and energy efficient when they don't."

So perhaps the problem that we are experiencing is somehow related to that?

I booted off the install DVD three times today and then left the machine for a while. And I experienced lock up each time.

Combined with the fact that there aren't many others posting in this thread experiencing the same thing I'm starting to come to the same conclusion that Apple did, which is that its a hardware thing, probably specific to my system. Thus I will take it to the local authorized apple repair person and see what he or she can do.

I finally got around to taking my iMac into an Apple certified repair shop today and they were able to duplicate my problem and they determined that it was a problem with my logic board. They will be installing a new one and hopefully that should fix the freezing up issue. I'll know in a few days when I get the thing back.

my iMac came back from the shop a few days ago with a new logic board. So far so good, no lock ups at all.

I am having the same issue...
I purchased my computer in March... and have barely used it, but it is freezing up and I can't figure out why.

As a PC user who is trying to make the switch, its a little disconcerting.

I have a 2006 iMac and my machine recently started freezing at sleep on a daily basis. No beach ball and no input response. Hard shutdown required. I'm leaning towards it being a Snow Leopard issue because it seems everyone with symptoms is on v.10.6.

I'm changing my Energy Saver settings from Computer sleep: Never to 15 and start using Apple/Shut Down often.

Same problem. Been happening since early this year - I got my 27" iMac i5 in November 2009. And now it's happening regularly. Yesterday I was running iMovie and iDVD. I left the machine while it rendered the movie and it was frozen when I returned. Had to power off to reboot. Same again when it had finished writing the DVD and was idle.

I had earlier thought the problem was related to Skype (how do I stop Skype starting automatically?!!) but I always get rid of Skype on power on.

I hadn't thought of it before seeing these posts but Yes, it seems to happen when the machine is idle for a period. Not particularly hot though.

The system froze each day the last three. So I called AppleCare and this is the advice:

1 Power off the machine every 2-3 days. This helps with memory leaks.

2 Repair disk permissions on the hard drive. Mine found 30+ problems.

3 Reset by taking out power and all other cables, hold down alt, cmd, R on the keyboard then press power on and immediately hold down P. Continue to hold until the second system chime.

4 On Macintosh HD delete System/Library/Caches folder and Library/Preferences/Configuration by dragging to Trash. Then go to the main user (under Places in the left Finder pane) and delete Library/Caches and Library/Cookies.

I've just done all that and it's working but I don't know for how long.

I think your hard drive is going to crash soon.
I would make a good backup as much as possible, so you won't loose any data.

I have tried all the tips in the forum, I dumped my magic mouse and changed to Microsoft Bluetooth 5000 4 button. No more freezes up, no more white screen or other color when waking up from sleep. I have not tried a wired mighty mouse or Bluetooth mighty mouse to see if that solved the problem. This looks more like a Apple mouse or Bluetooth issue. Running 10.6.6

HI
On this post you have that you Deleted "Library/Preferences/Configuration" Is that actually "Library/Preferences/System Configuration"?

And did you delete much of the other "com.apple... " entries in the Preferences folder?

Thanks in advance
Andy