Well, i am on Mac too - but i don't have this problem. Maybe because i am still on 10.1.5 and not under 10.2.x This will change soon, i plan to switch next week, to get a complete new class of problems :-)) Have you switched OpenGL on or off? It should be off (even when i don't have a problem with OpenGL on)! Maybe you give us a little more information (memory, disc space etc). Would be helpful.

One day your ship comes in - but you're at the airport.