There is a recent discovery that the macOS Catalina 10.15.2 update has make Capture One 12 and 20 tethering function not working properly.
Capture One Team is working on it as you receive this email, but in the meantime, please make sure that your Mac computer does not automatically update to 10.15.2 until there is a solution.
If your computer has already updated to 10.15.2, you should be able to use Time Machine Back up to revert it back to 10.15.1.
If you have any questions or concerns, please contact us at
www.digitaltransitions.com/dt-support/ and we will get back to you as soon as we can.