I had the same experience with 14.2.1 and an echo audiofirepre8, but also had to jump through some SIP hoops and such. !!! appears to be working. My last mac was an iMac g3. I failed to stay with apple when they switched to intel, as I prefer linux-- but no good linux DAWs at the time. Ardour changed that. Bought a 2nd-hand air m1 because i like fanless & could dork w/asahi worst case. This fix working was unexpected. If apple decides to support FW coreaudio without a hack, i'm back in.