Using FireWire Coolscans with Thunderbolt 4/5 PCs

The Problem:

For several years, the way to connect a FireWire Coolscan with a modern PC has been to use Thunderbolt, alongside a long string of adapters.

Apple Thunderbolt 3 (USB-C) to Thunderbolt 2, then the Apple Thunderbolt 2 to Firewire 800, then finally Firewire 800 to Firewire 400.
The joys of the modern world!

This used to work brilliantly, but after a security update to Thunderbolt 4 machines in mid 2024, all Thunderbolt 2 devices (such as the Apple adapter string) suddenly stopped working on TB4 machines (like my Intel NUC desktop)

Hooray for backwards compatibility!

 

The fix(es):

After learning that I would not be able to use my scanner with my PC in its' current state, I started searching the web for a fix.
However, I quickly realised that there's a LOT of misinformation, and most supposed fixes don't work!

So, here's what worked for me, and everything I tried that didn't :)

 

🌟 OWC 13-port Thunderbolt 3 dock (OWCTB3DK13PSG)

This TB3 dock is in my opinion the IDEAL solution if you must use Thunderbolt.