mackbook pro 2017 2 port high sierra 10.13.4
apple thunderbolt 3 to thunderbolt 2 adapter plus apple thunderbolt 2 to firewire adapter working on la cie drive
studiolive 16.4.2 AI firmware ver- SL1.0.9194
On opening Capture shows Built-in Output only
Have tried on Mac Pro firewire to firewire with same result
Is there a system setting needed?