Usually occurs when dragging layers around the canvas. Any one experienced this issue?
The monitor screen works fine, it only flashes within the photoshop workspace.
Mac OS X 10.9.2
Processor 2.5 GHz Intel Core i5
Memory 4 GB 1600 MHz DDR3
Graphics Intel HD Graphics 4000 1024 MB
Install the MacOS Updates, you should be on 10.9.4 -- Unfortunately, Apple does still have some video driver bugs that have not yet been fixed for certain systems/configurations.