Question: Using firewire 400 device on 2017 Macbook Pro
I recently got a new Macbook Pro 2017 version (High Sierra), and am trying to get it to work with my audio interface, which is "Firestudio Project" by Presonus. It's a somewhat dated interface with firewire 400 ports, fully working.
I had to jump through some hoops in terms of the adapter cables required to go from firewire 400 to a thunderbolt 3 port. A 400 to 800 cable (good quality, not by apple as apple do not sell such a cable), then an 800 to a thunderbolt 2 adapter (apple), and a thunderbolt 2 to a thunderbolt 3 adapter (apple).
Ok, well, now what? I would like to use this firewire device to record audio to the macbook, it's an 8 channel interface, so I have installed audacity, and studio one, to record, but my macbook does not see the device as an option for audio input, in both the "Sound" and the "Audio MIDI setup" i haven't found anything to solve the issue.
If I do a "system report", under "FireWire Device Tree", a firewire bus is recognised, with the name "FIRESTUDIO_PROJECT", the manufacturer is identified as "PreSonus" and the maximum speed is identified as "Up to 400 Mb/sec", so all seems correct. But apart from stating this information, I don't have the option to use the firewire device in any capacity.
What can I do to use the device on my new macbook?
MacBook Pro, macOS High Sierra (10.13.3)