MBP late 08 running 10.8.4. This started a few weeks ago and is getting worse: The computer wakes from sleep and within about 10 seconds, the screen freezes and the cursor disappears. I have to use the power button to crash it and then restart. It's happening now 2 to 3 times a day. At first it seemed to be mostly happening in Mail, but then started happening in other Apps. Just now it wouldn't even wake from sleep. (The "sleep" light was solid, not "breathing".)
One bit of weirdness in this: on several occasions (but not every time) after the freeze a strange graphic appears on the screen, about 1 inch by 1 inch that looks like something out of the credits in the movie "The Matrix". The characters, digits, whatever, are moving and changing, as if it's recording or processing something. It has appeared after the freeze (overlaying) in several different applications.
Any thoughts, suggestions, or help would be appreciated!
Wish the video issue was the answer, but it doesn't seem to be. Video is stable and works fine.
A freeze just happened again... this time in Calendar. And while nothing else will respond, the same little "The Matrix" box is "buzzing away". Could this be something like a keystroke logger at work? And how would I find out if it was? I go to Activity Monitor and there are lots of proccesses running I can't identify.
A follow up. I did take it to the Apple store and they had the machine several days. They were finally able to recreate the problem and said it was a problem with the System software. (They never explained more.) I had backups, so they erased the drive and reinstalled 10.8.3. I've just completed a Time Machine restore... so far so good. We'll see how it goes from.here. Thank you for the suggestion to take it to the Apple Store. I'm amazed they ran all these tests and a[pparently found the problem on an old, out-of-warrantly machine... at no charge! Amazing!