In Mac OS X when I use QMC2 to launch a machine, when I escape out to quit the screensaver starts up. In fact when I launch a machine that is unable to launch for whatever reason (missing/bad roms, etc.) MAME quits and goes to the screensaver. This is kinda annoying if the screensaver requires more than a random wiggle to deactivate.
My mac is normally configured to go to screensaver when the mouse is in the top-left corner. I changed the hotspot and when exiting MAME it stopped going to screensaver and the mouse pointer is in the top left corner. Is QMC2 moving the mouse there, or MAME?