All that’s a headache so I just keep my old Mac running old software. It’s annoying to not have the latest features, an ancient version of logic that runs like shit, no support for new plugins, etc, but it still works.
Maybe someday I’ll upgrade but it would be pretty costly to do so and this works despite the headaches. Really wish manufacturers were required to at least release documentation of hardware like this when they dropped support; it was quite expensive back in 2005 or whenever I purchased it and now it’s basically useless outside of this niche scenario. Frustrating and one of the many projects I want to someday get to although I’m probably too stupid to reverse engineer a FireWire bus device and write a driver ha