Reply to thread

Message: <blockquote data-quote="Raz0rEdge" data-source="post: 1781559" data-attributes="member: 110816">Those types of graphical artifacts are usually indicative of a GPU issue. If they can be "wiped" away by moving a window around, it's just beginning to fail and will get worse as time goes on and the issues will either persist regardless of what you do.Grab a copy of <a href="https://www.maxon.net/en/products/cinebench/" target="_blank">Cinebench</a>, a graphics benchmarking tool, and see what happens. This application will stress the GPU primarily so if you start seeing issues, then you should start thinking about possible fixes (replacing logicboard or upgrading to a newer iMac)</blockquote>