System Freeze. Cursor moves but adds horizontal lines. Mountain Lion.
I'm experiencing periodic system freezes. The system becomes unreponsive. No clicking works, etc. The cursor does move with mouse movement but changes to include 8 horizontal lines. See image. The cursor will move and the lines remain with the cursor. A hard power down is the only option.
When rebooting, I get the white screen of death. Only way to boot is in safe mode. I can run disk checks, resets, etc. System comes back but will freeze again with same symptoms. Anyone seen this behavior or similar?
Running Late 2009 27" iMac. Mountain Lion 10.8.2
iMac, OS X Mountain Lion (10.8.2), Late 2009 iMac