same is happening to me. it is a horizontal line all the way across the screen. it moves locations vertically at random though. i am on an 27" imac, late 2012. screen capture does not catch the glitchy pixels, but i was able to record it externally. it is most obvious looking down at grass for me.
same is happening to me. it is a horizontal line all the way across the screen. it moves locations vertically at random though. i am on an 27" imac, late 2012. screen capture does not catch the glitchy pixels, but i was able to record it externally. it is most obvious looking down at grass for me.