I just upgraded to Catalina 10.15.4 and Audacity 2.4.1. I am trying to play stereo recordings done on Audacity thru my Apogee Quartet in two channel mode. I cannot get any audio. If I switch to mac internal speakers I get audio thru those speakers. Does Audacity support Apogee Quartet?
Can you switch to the Apogee in System Preferences > Sound > Output and get iTunes to play through it?
– Bill