I just got the following email from the folks that make Capture One:


Hold off from updating your Mac OS to 10.15.2, as it will hinder the tethering functionality in Capture One 12.1.4 and Capture One 20.0. We're working on a fix as fast as possible. If you've already updated, please consult Apple Support to find how to revert to an older version of Mac OS in the meantime.

Capture One is my primary tethering software, but fortunately, I use a Windows machine, so I don't have an issue.