I own a Motif XF6 with a FireWire card and a Quad Core Mac Pro with OS High Sierra.
Since the upgrade to High Sierra my firewire connection has stopped working, so much so that the motif is not even showing up in the Audio/Midi app on the Mac Pro.
I have tried to download all sorts of drivers from the Yamaha website and none of them work.
I am using an IEEE FireWire cable with a thunderbolt adaptor which Apple say, is compatible with the Mac Pro.
I was wondering if someone could help me out with this problem.