Two games I have tried - Tropico 5 and Civ 5 - produce a similar problem on my 2015 MacBook Pro. Every so often, the image on the screen will "roll" sideways two or three times, and then turn black with a red dotted line from top to bottom, about 1/3 of the way from the left side of the screen, for a few seconds. It returns to normal after a short while with no apparent permanent harm done. This is fairly irritating on its own, but it is accompanied by a sound card problem: when this happens, the sound begins to drop in and out very quickly, as though someone is pressing and releasing the mute button on the keyboard. This can be fixed only by quitting the program and restarting. Has anyone else encountered this problem?