I recently moved over to an iMac desktop with dual monitors (specs below). When in PS, if I use the mouse or my tablet with quick gestures - like most brush strokes - or even hovering over the tablet sometimes, the window displaying PS shifts and bit, and then wraps around from the right side of the screen to the left. If I stop for a second, the monitor flashes, and then the display returns to normal. Restarting PS or the computer doesn't fix it. The second monitor doesn't appear to be changed during this process. Any help in unraveling this one would be super appreciated
iMac Retina 4k, 21.5 inch primary (HP 22cwa secondary)
3.1GH
16gb memory
OSx 10.11.1
Wacom Intuos CTL-480/s