You may have to insert a Thunderbolt dock (either TB1/2 or TB3) into the chain, as the the voltage requirements may be too great for a purely passive connection.I'm using the SONY i.LINK output with a Tera Grand Firewire 800 9-Pin to Firewire 400 4-Pin Cable inputted to a Thunderbolt 3 (USB-C) to Thunderbolt 2 Adapter and Apple Thunderbolt to FireWire Adapter. This works with my SONY DV Video camera but not the SONY GVHD7001 deck, which has more useful functions than the camera.
I'm not familiar with that. See if you can borrow a TB dock, or find one cheap via eBay.You may be on to something. As I recall when I used this on Snow Leopard I used a Kramer PT-1FW DV Line Protector. Is there someway I could incorporate this into the chain for the iMac?
If you do, make sure you can return it.Do you think I should try the CalDigit Thunderbolt 4 Element Hub?