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Apple Computing Products:
macOS - Operating System
What are these black rectangles on my Mac's desktop?
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<blockquote data-quote="Lifeisabeach" data-source="post: 1523019" data-attributes="member: 38864"><p>I'm inclined to agree that it's a hardware problem with the GPU... except for that oddity with the volume slider that was resolved with a software update. Maybe there used to be a way to make it turn blue prior to the software update, but I can't make it go blue here (10.8.4) no matter what I try. I'm leaning to some file corruptions in the System Library, perhaps the graphics drivers and who knows what else. Before running up a bill for diagnostics/repairs, I would follow the suggestion before to make a clean installation to an external drive and boot from that. That will provide a definitive answer.</p><p></p><p>As a side note, if the System Library does have corrupted drivers, then it could be that the drive is failing. So before anything else, make a backup of your important files!!!!!!!</p></blockquote><p></p>
[QUOTE="Lifeisabeach, post: 1523019, member: 38864"] I'm inclined to agree that it's a hardware problem with the GPU... except for that oddity with the volume slider that was resolved with a software update. Maybe there used to be a way to make it turn blue prior to the software update, but I can't make it go blue here (10.8.4) no matter what I try. I'm leaning to some file corruptions in the System Library, perhaps the graphics drivers and who knows what else. Before running up a bill for diagnostics/repairs, I would follow the suggestion before to make a clean installation to an external drive and boot from that. That will provide a definitive answer. As a side note, if the System Library does have corrupted drivers, then it could be that the drive is failing. So before anything else, make a backup of your important files!!!!!!! [/QUOTE]
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Apple Computing Products:
macOS - Operating System
What are these black rectangles on my Mac's desktop?
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