I purchased the POD HD Pro X after I had already upgraded to Big Sur which Line 6 does not yet support. Line 6 Monkey will not run at all. EDIT app could not find POD even though Mac system report showed it was connected. Downloaded latest Helix drivers because they are 64-bit and installed. Problem solved. Line 6 Monkey still doesn't run but License Manager now sees POD and allowed me to authorize it. POD shows up in audio devices and Preferences.