i only have a PC so don't know about the mac and it's the entire time it's running this happens. also thanks for responding! sorry I was late in my response lol
first question is yeah older versions worked fine, and I haven't been able to get to the rest of the game so I don't know if things would work fine past that. and I always played it windowed.
Pressing the spacebar a bunch of times will get you past the dialog, and maybe to the point where you can continue, but I doubt it. Looks like the color buffer isn't clearing at all.