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northernlight

macrumors member
Original poster
Feb 11, 2020
46
10
Had this issue in the past sometime but haven't found an explanation yet. There's a persistent rectangular artefact on the bottom left of the screen on Desktop 1 but not on Desktop 2 (see picture).
When Desktop 1 is deleted, it moves to Desktop 2. SMC and NVRAM were reset a few days before this appeared. After resetting NVRAM it has disappeared. Not sure what causes it but this is strange (and annoying).
Also not sure if connected, but sometimes the speed of text appearing on screen slows down on this machine.
 

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Fishrrman

macrumors Penryn
Feb 20, 2009
29,279
13,377
Is that there all the time?
Or... just some of the time?
If... just some of the time... when....?
 
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