Yes i change it to Boot Once also, no this is my first time trying it on this built. However, i know is not big sur because i have use it on my Mac Pro 5,1 with open core as well, also on a 2019 macbook pro.
What’s is funny is that the Apollo Twin works like a charm.
Big Sur 11.6.7
UAD Apollo FireWire Silver Rack With Thunderbolt 2 Option Card
This is my first time trying this setup.
UPDATE: It does recognize my Apollo Twin Thunderbolt 2 but not the rack.
I AM USING Apple USB-C to Thunderbolt 2 adapter (TB3 to TB2)
@CaseySJ how you doing my friend, first of all, thanks again for everything you do for the community. I just want to say that you had helped me before and once again I'm in the need of your expertise, lol, sorry about that.
I have done this exact setup before but for some reason it won't work...