5 Replies Latest reply: Jun 17, 2012 4:32 PM by Muriel Areno
Muriel Areno Level 1 Level 1 (5 points)

I have just acquired a late 2006 24" iMac with 1GB of RAM. It came with Leopard installed, disks for Leopard and Snow Leopard, and iLife '09. The hard disk was full, as in, zero K free. I threw away a lot of stuff, ordered 3GB of RAM from OWC, and installed Snow Leopard. I then noticed several one-pixel high horizontal lines on the display, and the Mac would freeze up on occasion, but I thought it just needed RAM. I opened iPhoto and played with Faces for quite a while. The next day, I opened a different iPhoto library (my libraries are on an external firewire hard drive) and the Faces scan made the computer freeze. I closed iPhoto, and bits of windows started missing, or repeating themselves as I dragged the mouse. Sometimes there would be "holes" in windows showing my desktop image underneath, or lines of bright pixels would appear. I still thought it was the lack of RAM. Repairing the disk with Disk Utility didn't make any appreciable difference.

Today the RAM arrived and I installed it. The Mac sees it, but the problem has not gone away, it has in fact gotten worse. Every time I go to Disk Utility (starting up from the SL disk), it shows problem, I let it do the repair, it comes up successful, I restart, and it happens all over again. When I do a Safe Boot, everything is perfect. Should I reinstall SL? iPhoto? Downgrade back to Leopard? Is my hard disk bad?

I have DiskWarrior 4.1.1, but I'm afraid to try; not sure if it's compatible with SL.

Ideas, anyone?

iMac, Mac OS X (10.5.8), 24" Intel