I have a new IMac (Three months old) with Photoshop & Lightroom CC. Photoshop ran without any problems until last update. Now I get an error message if I try to change background/foreground colour or use eyedropper to select colour. I have no thrird party plugins. I have tried removing preferences as suggest by Adobe which did not solve the problems. I am now in a yearly contract with a produce that does not work.