Fullscreen does not display on my Mac with 1.6 update

I didn't have this problem until after the update to 1.6. Now, when I try to play fullscreen, the screen goes black. I believe I managed to play 1.6 fullscreen after I first loaded the update, but I haven't been able to view the game fullscreen since. The game continues to run (I can hear it and the cursor changes if I "esc"), but I have no visuals. I have to F11 to exit out of the window. Can my computer not handle the update, or is something else amiss?