I have a very annoying issue with GW2. If other Mac owners are or aren't having issues, it might help to try and isolate the cause... I'm playing on an rMBP using an external display via HDMI (1680*1050). Sometimes while playing, at a random point in the game (not reproducible) the game screen turns black. I can still bring up the F11 menu and esc menu but not other menus like hero or inventory. Normal UI elements disappear - I can only see menus and the mouse cursor. If I press esc and click logout, to try to go back to character selection, that doesn't work either. I have to quit via task manager and restart the game. Strangest thing is, after a couple of crashes and restarts, the problem goes away until I restart my computer. First crash is usually after maybe 5 minutes. Second crash maybe half an hour, and usually it's fine after that. I've tried both 304.79 and 296.49 drivers, same issue. Not tried the very latest ones - will do so tonight. Anyone else with the same problem?