Topic: Fireface 800 and MacOS Sequoia
My setup (iMac M1, Fireface 800, Logic Pro X) is still running on Sequoia 15.0 without problems! I have the Fireface 800 connected via the usual two (original Apple-)adapter daisychain. Latest driver 3.41 and firmware 2.77 of course.
Additionally all UA-plugins are running. Wavelab Elements 11.2 (which I rarely use) also.
I didn't have to reinstall or update or reactivate anything.