SOLUTION for Ultra studio mini recorder not detected on M1 mac mini.
I was able to get the UltraStudio Recorder 3G (Thunderbolt 3) showing up in Microsoft Teams with an Apple M1Mini.
1. Update to latest OSX Big Sur 11.1
2. Install latest Microsoft Teams 1.3.00.28778
3. Remove Teams Code Signature as instructed by Glen Aspeslagh
QUOTE
Removing Team's code signature is another way to re-enable virtual cameras. To do this:
1) Ensure that you have the latest version of Microsoft Teams, by picking Check for Update from the menu in the top right corner of the Teams window.
2) Once you've assured that you are up to date, completely quit Teams.
3) Open the Terminal app, found in Applications → Utilities.
4) Copy and paste this command into Terminal and press return:
sudo codesign --remove-signature "/Applications/Microsoft Teams.app/Contents/Frameworks/Microsoft Teams Helper (Renderer).app"
5) It will prompt for your Mac's admin password. Note that you will not see anything happens when you type it. Press return.
6) Re-open Teams.
UNQUOTE
see original Ecamm help page
https://support.ecamm.com/en/articles/4 ... ams-updateI can now use all virtual camera's, both via OBS and software like EpocCam Pro