Help! Just bought a radium 49 because it says it is compatible with mac and it won't work. I can not find it in the audio midi set up to connect to my interface.  I have downloaded several drivers and they all do not work.  The power to keyboard works but it will not connect to my computer. I have seen online a lot of people are having the same problem

Computers & Internet - M-Audio - M AUDIO RADIUM USB KEYBOARD SNDUS70070