Black Magic Intensity Shuttle not seen by OS since Monterey

Please help.
After upgrade to Monterey, my BM Intensity Shuttle is invisible to my machine and ALL software including OBS.
This is impacting on work / income.
Yes, I have checked system prefs + permissions re: OBS.
Yes, my BM device is getting power - it is warm.
Yes, I have tried restarting.
Yes, I have installed Black Magic Desktop Video.
No, Desktop Video also does NOT see my device.

Screen Shot 2023-04-02 at 4.44.48 pm.png (123.44 KiB) Viewed 715 times

Screen Shot 2023-04-02 at 4.44.15 pm.png (117.23 KiB) Viewed 715 times

As of Desktop Video 11.7 or later, the Intensity Shuttle is supported on Intel Mac computers ONLY running MacOS Big Sur. They will not work on an M1 Mac.

Correct, BMD has a hardware & OS compatible list at their support.

I am still using a MacBook Pro with 32bit OS (Mac OS Sierra 10.12.6) for my Intensity Shuttle Thunderbolt 2,
works still perfect even with 8GB RAM but use it only for capturing SD like VHS PAL with codec ProRes422LT
Another (2nd hand) MBP with better hardware i update the OS on, as far as it can be done, one must be carefull with any update/upgrade.