If anyone else has had success enabling playback or recording on the UR44 (or similar) after updating to macOS Catalina (10.15), I would greatly appreciate if you could detail exactly how you achieved this. If you could share your Yamaha Steinberg USB Driver version number (V1.10.5?), any reinstallation procedure, whether or not your device is in class-compliant mode, and any other information that might let others replicate your success, that would be very helpful.
Also, for those like me who missed this quiet update, it seems we should expect formal support in January of 2020:
To Steinberg: It is truly unacceptable, and frankly infuriating, for it to take 6 months from the release of a new OS’s beta (in June 2019) to add driver support for products that cost hundreds of dollars, boast “ultra-stable drivers”, and are completely useless until this support is added. That it took 4 months to arrive at an estimated release date is simply absurd. Do better.