UR242 did not reconize in garageband
Hello. I am a newbie.
I bought a Steinberg UR242
I have a problems connecting the UR242 to my Macbook Pro 2018.
When I do connect things start off ok. "Steinberg UR424" appears in the Input list in System Preferneces Preferences > Sound, and also in Audio Midi Setup. BUT, as soon as a open Garage Band, the Steinberg UR242 DISAPPEARS from the Sound input list (and Audio Midi Setup)! At this point I cannot select the UR242 as an input because the system doesn't see it any more. I don't understand why this happens.
In summary, the system "sees" the UR242 after I plug it in. But as soon as I open Garage Band (or the Cubase software), it no longer is visible from Mac as an input, and visually disappears from the Input list in System Preferneces Preferences > Sound.
Does anyone know what's going on?
MacBook Pro 13”, macOS 10.14