Ah, #Harrison #Mixbus 10 Pro on an elderly #OSX, works out of the box, such a good #DAW.
The license is personal. So you can install Mixbus on any of your machines if you and only you are using it. I really hope Harrison will stick to this policy.
Because actually if I really do just the tracking on OSX, I use #Ardour instead anways.
It took me longer to find out how to do a screen shot on OSX than to install Mixbus.
Now let's see what if the #RME #Fireface400 still likes me.
EDIT: Oh yes, the Fireface400, with this stupid chain of adapters from Thunderbolt3 down to Firewire 400, still works. What however went bad is these two solemn USB-C/Thunderbolt connectors on the MacBook. Loose contact on both. And there's no other connectors. Let's see what poisonous Kontakt60 spray can do.