thanks, but it doesn't allow me to change any volume. The controls are all greyed out.

After I choose Avid Eleven Rack as the Output, the Output Volume is maxed out (and greyed out). In the middle it says "The selected device has no output controls".

It's been like that since Mavericks, but it did work under Mavericks even though everything is the same. And I used to use the volume knob on the 11R to control volume of sounds from my Mac and the guitar.

It is very strange it works for most of you but not me. =(