When I run MagicDraw 18.5 on Mac OS X 10.11 El Capitan in the native full screen mode, why do most dialogs appear behind previously open dialogs?
This is a known issue with Mac OS X 10.11 El Capitan operating system. Most dialogs in the application will be displayed behind previously open dialogs, affecting usability of the user interface. There is no solution to this problem. Please try to downgrade the Mac OS to some earlier version.