UltraStudio 3D, MacBook Pro, macOS Big Sur

The Desktop Video Setup application is not finding my UltraStudio 3D, and therefore it's also not found in Davinci Resolve.

Has that expensive and still fully operational interface now resigned to the WEEE recycling bin?

My UltraStudio 3D is still discovered by the Mac - so it seems to me that it can only the drivers from BlackMagic which are turning the device into an expensive landfill item. I'm really disappointed with BlackMagicDesign if you have dropped support. Exceptionally un-environmentally friendly, and costly to me!

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    Thunderbolt Bus 0:

      Vendor Name: Apple Inc.
      Device Name: MacBook Pro
      UID: 0x0001D75535XXXXXX
      Route String: 0
      Firmware Version: 41.4
      Domain UUID: 07CEC889-7EA4-2858-BF0B-7A3BEEXXXXXX
      Port:
          Status: No device connected
          Link Status: 0x7
          Speed: Up to 40 Gb/s x1
          Current Link Width: 0x1
          Receptacle: 2
          Link Controller Firmware Version: 0.39.0
      Port:
          Status: Device connected
          Link Status: 0x2
          Speed: Up to 10 Gb/s x1
          Current Link Width: 0x1
          Receptacle: 1
          Cable Firmware Version: 0.1.18
          Cable Serial Number: C4M1473024JXXXXXX
          Link Controller Firmware Version: 0.39.0

        UltraStudio 3D:

          Vendor Name: Blackmagic Design
          Device Name: UltraStudio 3D
          Mode: Thunderbolt
          Device ID: 0xA123
          Vendor ID: 0x4
          Device Revision: 0x1
          UID: 0x0004000000XXXXXX
          Route String: 3
          Firmware Version: 22.3
          Port (Upstream):
              Status: Device connected
              Link Status: 0x2
              Speed: Up to 10 Gb/s x1
              Port Micro Firmware Version: 0.1.4
              Cable Firmware Version: 0.1.18
              Cable Serial Number: C4M1473024JXXXXXX

I wonder if this problem is related to the other issue people are having with the UltraStudio mini monitor.

I tried installing Desktop Video driver 12.1 and following the workarounds posted there, but that workaround does not even run correctly.

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$ sudo kextutil /Library/Extensions/BlackmagicIO.kext
Password:
Executing: /usr/bin/kmutil load --bundle-path /Library/Extensions/BlackmagicIO.kext
Error Domain=KMErrorDomain Code=31 "Error occurred while building a collection: in '/Library/StagedExtensions/Library/Extensions/spl.kext/Contents/PlugIns/KernelExports.kext/KernelExports' missing __TEXT segment" UserInfo={NSLocalizedDescription=Error occurred while building a collection: in '/Library/StagedExtensions/Library/Extensions/spl.kext/Contents/PlugIns/KernelExports.kext/KernelExports' missing __TEXT segment}

I've also tried the Desktop Video driver 12.2. Nothing stops my UltraStudio 3D from looking like an expensive brick.

I have the exact same behaviour and can't really see what's going on.
This is since the latest BigSur update (11.6.1 - 20G224) only.
Whatever I do - nothing get's the card back alive.

Nothing stops my UltraStudio 3D from looking like an expensive brick.

I was wondering if you have any news on this? After upgrading to Big Sur my UltraStudio 3D stopped working. I was hoping for a driver update and installed the latest, but that didn't work.