Here’s an article on how to use OBS with Zoom. Caution, it’s bleeding edge at this point and not quite production ready…
How to use a virtual camera for Zoom, Microsoft Teams and Google Meet in OBS for Mac
Workaround for code signing in MacOs 10.15.3 Catalina
APPLICATION=/Applications/zoom.us.app && codesign -d --entitlements :- $APPLICATION | { xml2; echo "/plist/dict/key=com.apple.security.cs.disable-library-validation"; echo "/plist/dict/true"; } | 2xml > entitlements.xml && sudo codesign --sign - $APPLICATION --force --preserve-metadata=identifier,resource-rules,flags --entitlements=entitlements.xml && rm entitlements.xmlTip: you’ll need to re-authorize mic/webcam/screensharing in Zoom after re-signing the code. So don’t forget to run through a test meeting first to make sure everything is working before going into an important meeting.