Have a look through the Mac Plugin forum for an update
https://www.pgmusic.com/forums/ubbthreads.php?ubb=postlist&Board=120&page=1
OR
Run the Biab app along side in DAW Plugin mode then drag the track name directly onto the the track inside the BBPlugin.
You can drag the track to "+" in the DROP this will give an option to render dry, flat and center then drag into the BBPlugin.