If you have a Mac and have not yet downloaded the latest security update and quicktime update, READ THIS!!!
Several hours ago, I ran a software update on my mac only to find that afterwards, my finder kept crashing and re-setting (my desktop icons kept disappearing and reappearing every 2 min., and any open windows would close)
I spent 4 hours backing up everything I had to DVD's thinking that my old G4 was on her death bed.
Tried disk utilities, resetting the PRAM, etc... no luck.
As a last ditch effort I did a google search and lo and behold, I found a forum where they were discussing this problem. And someone found the fix!
Apparently, the newest version of quicktime has a conflict with ...stuffit??
Anyway, it was a one click solution and it worked for me.
Here's what you need to do to resolve this issue:
It all seems to be linked to Stuffit and a preference called Stuffit AVR (Archive Via Rename): In your system preferences go to the bottom and click on the Stuffit AVR option. Click the Stuffit AVR tab on the left, and click the "STOP" button. This should do the trick. For some reason this is cycling through our desktop/finder and causing so much of the frustration since this update.
Hopefully this will save any of my fellow Mac users from experiencing the same panic/desperation that I was going though for the last 6 hours.