I keep a close eye on my RAM usage so I don't think it's due to running out of memory. I know what that looks/feels like, and this is not the same.
Usually this happens when starting or activating an application from what I remember.
I will report back here with more details if I discover anything else significant.
I had a similar problem: I replaced the Western Digital Green disk drive with a Seagate and the problem disappeared. The WD was just an interim solution anyway -- but while the "green" drives are fine for backup they don't make good system drives.
You may have a similar issue or a failing disk drive.
I am having this same issue, and it's very frustrating.
It's happened while on Safari, also using iTunes and Toast.
Periodically, everything will freeze and the spinning wheel comes on the screen. It typically lasts about 30 seconds. There is nothing particular that sets this off. If I leave iTunes on playing music, the music will stop until it comes back on.
This is problematic for me because i use my mac for DJing and i have a gig next week. I really need to get this fixed, else i won't be able to use this machine because there will be gaps in the music.
Any help would be greatly appreciated.
Have any of you tried the following? That's what I would do.
Try using Disk Utility to do a Disk Repair, as shown in this link, while booted up on your install disk.
You could have some directory corruption. Let us know what errors Disk Utility reports and if DU was able to repair them.
Then Repair Permissions.
+*Verifying volume “Macintosh HD”*+
+Performing live verification.+
+Checking Journaled HFS Plus volume.+
+Checking extents overflow file.+
+Checking catalog file.+
+Checking multi-linked files.+
+Checking catalog hierarchy.+
+Checking extended attributes file.+
+Checking volume bitmap.+
+Checking volume information.+
+*The volume Macintosh HD appears to be OK.*+
I notice that the lockups seem to be happening less frequently. I didn't had one yesterday and haven't today, so far.
I believe the free space on my drive at the time of install was probably highly fragmented. If Snow Leopard installed onto that free space, it could be that the access times for certain system files have been distended by that fragmentation. Just a theory.
Ok, after rebooting to disk utilities off the snow leopard disk I tried repairing the drive- no problems, did the repair permissions, found one minor thing and it fixed it. That was yesterday, today I had it freeze up 3 times just like before, same symptoms: Spinning wheel, no response, after 30 seconds it goes away.
I hope there's a fix for this because I really can't have this happening in the middle of a presentation or something. "Oh wait, while I make up 30 seconds of stuff to say while my Mac that never crashes stops being stupid..."
I am having all the same issues as above. Clean install does not fix it or disk utility repairs..............Happens alot during safari, word, switching between tasks too. A force quit does not work.........everytime it happens I have to do a hard reset pressing the power button down to re-boot. Not sure what is casuing it, I can tell you it happens alot surfing the internet.