Using Magic Keyboard with 3rd party Displays I have a Mac mini. I am using a Lenovo ThinkVision Pro2840m, connected via DP, as my monitor. I am using the Magic Keyboard. Can anyone please tell me the procedure to make the display brightness controls work with this monitor right from my keyboard? The screen brightness shortcuts, and the volume buttons are not working. I'm running OS X El Capitan.
Third-party monitor brightness can't be changed by using the Magic Keyboard keys. You'll have to use the settings on the monitor.