Prior to upgrading I had no problems.
I am running OS 10.6.8
Have a Xenyx mixing board that runs USB into a powered hub and then into my MAC.
I have a Shure Pro 3H mic.
I can selected the correct USB Audio Codec (I have two)
The mixer shows sound being generated yet I am not recording into Audacity
The only choice I see is “Core Audio”
Is there something more I need to do so that I can record audio like this on this version of Audacity?