I got a new MBP with Big Sur.
My problem is that the PreSonus interface is not recognized by OSX.
That’s probably because it is going thru a Satechi port box.
(The port box works pretty well otherwise.)
The Satechi is necessary because Apple in its infinite wisdom
took away each and every port in the MBP and replaced them all
by not 1 not 2 not 3 but 4 USB-C ports; no card reader no hdmi
no thunderbolt and certainly no USB-A.
Not specifically a Soundjack problem, and probably not Big Sur- caused,
but might affect other Big Sur users.
Meanwhile, I’m keeping the old MBP for now.