I'm on MacOS 10.11.6 (latest available update for El Capitan) because some of my apps don't work with Sierra. Got the new Magic Keyboard with Numeric Keypad. Function keys are not working as marked (brightness, volume, etc.). I know instructions say need MacOS 10.12.4 or later. But I have the Magic Keyboard without keypad and it works perfectly - including function keys. Don't understand why I can't use all the functions just because I'm on El Capitan. Also, it did not auto-configure via lightning USB. Smaller magic keyboard auto-configured perfectly too. Anybody have any fixes for making function keys work with MacOS El Capitan? (Google searches reveal others have this issue too but no fixes even after calling AppleCare.) Thanks in advance.