im using 10.42 on iMac. When I am in full screen, I can get the menus at the top of the screen, but the drop down menus don't work. Also, on the rare occasion when they do work, I can't get out of full screen. I recall I had no problems like this when in windowed mode. It's only in full screen. IMac is new 27 inch 5K with ssd. Thanks for any help. I had to shut down the entire computer to get out of x-plane. File/Quit didn't even work.