Nope it doesn't work here either. I forgot the driver was still old when I updated my computer.

I have a MacBook Pro (Retina, 15-inch, Mid 2014) with a Thunderbold to Firewire converter running Yosemite. I tried reinstalling the drivers.

System report does find the H8000FW on the Firewire bus and Eventide Control Panel doesn't.

It did work on 10.9 with the Firewire converter with the same setup.