Crash when resizing windows - OS X 10.8.3

When I try to resize the minecraft window, either using the drag arrows at the edge of the window or the maximize button, the minecraft screen goes all black and white lines (a little like white noise on a tv). My external display blacks out, then, half of a second later, my built-in display goes out, and my computer reboots. It then tells me that my computer has been restarted (duh) due to a problem. I've tried using magic launcher, the dev launcher, and resizing different ways. I don't want to use the Minecraft full screen, because then I can only have one screen in use.