Apparently on my previous tries, I must have had an error of some sort. Thanks now to @daneover and the great step-by-step guide they provided, I'm now listening to some tunes on YouTube, via my Mackie Onyx-1220i 's Firewire connection!! Mac mini 2023 with M2 Pro | 32GB RAM MacOS Sequoia 15.6.1 Followed the instructions in sections 1, 2, and 3. No apparent issues installing the FW kext from the AppleFWAudioVentura.pkg. Downloaded the ZIP file & extracted the .pkg to my desktop. Note: One thing I did not do is have the Mackie connected to my Mini via FW during the whole install/config. I waited until the last step in part 3 (after double reboot) to finally get connected. Also of note, I have had success via 2 different ways to connect to my Mini. In previous attempts, I tried the dongle daisy chain method with a FW800 (male) > FW400 (female) adapter connected to the Apple FW800 > TB2 adapter, and finally the TB2 > TB3 adapter. This time around, that collection of adapters is working great. Prior t