Can't use the rotate or color sample ring. I also see random short horizontal lines during edits. I have Photoshop CC up to date. My graphics card is a Radeon HD 6670M. My Mac is a bit older, but these issues only cropped up after the latest update. Was fine the last time I used it. When I go into preferences OpenGL features are greyed out. Same goes for enabling the sampling ring in eyedrop options. It's greyed out.
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