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When I start my iMac it seems to start ok at first, then the screen gets pixilated and freezes up. Some times I can get further in the start up process than others. I did just update to OS 10.10.3.
Mac (21.5-inch, Late 2009)
3.3GHz Intel Core 2 Duo
8GH Memory
Processor Name: I
Number of Processors: 1
Total Number of Cores: 2
L2 Cache: 6 MB
Memory: 8 GB
Bus Speed: 1.33 GHz
I had to make an OS 10.10.3 Start Up Disk and reboot using that. I checked the disk for any damage then restored from Time Machine Back up. Seems to be working better.
iMac picture pixilated and freezes up on start up.
