Looks like Thunderbolt-to-Firewire adaptors can cause issues with audio interfaces btw:
https://cooltechpc.com/articles/thunderbolt-firewire-and-usb
[quote]Although Apple has released a Thunderbolt to Firewire adapter, it isn’t a direct conversion. The Thunderbolt to Firewire adapter actually places another chip in between the Thunderbolt port and your Firewire device, which requires a driver. This will cause issues with audio devices, which are particular about which chipset your 1394 (Firewire) card has. External devices (such as the M-audio Project Mix I/O) may not even show up, unless you use a 1394 card that has a TI chipset. If you need to use a Firewire device (particularly for audio recording), we recommend using a Firewire card that has a TI chipset, instead of using Apple’s Thunderbolt to Firewire adapter. Alternatively, you could use onboard Firewire, but beware onboard Firewire doesn’t normally include a TI chipset, and is subject compatibility problems. This is why we use Firewire cards with the 1394 Ti chipset in them when building our digital audio pcs (if the customer wants the option of using Firewire).[/quote]