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mattnotis

macrumors regular
Original poster
There are a bunch of horizontal lines that're plaguing my iMac. What's causing this?
 

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...unless it's widespread - do you see it on other apps, or your desktop?
 
Firefox is having trouble rendering. Switch to Chrome or Safari.


...unless it's widespread - do you see it on other apps, or your desktop?

Yes, it pops up on my desktop as well. And occasionally when I watch movies in the Quicktime player.
 
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