[Upside Down Screen Upon Game Start]

FN-F11 will hide the window on some macs instead of going to fullscreen mode (depends on keybindings), but if you go to on the main menu or the game menu and click

Options -> Video Settings -> Fullscreen Mode

and toggle it to ON it should work.

Thanks for this, it is a good work around. But I wish someone could indentify the problem and come up with a fix