in Catalina OBS needs screen recording permission to capture the windows. Problem is we can not add it there ourselves. There is a terminal command that opens OBS so it has the permission. Issue here is that we have to do it every time.
terminal
open /Applications/OBS.app/Contents/MacOS/OBS --args -picture
here is the fix for the above
1) add a Display Capture in Source. Catalina will ask for Screen Recording permission
2) Allow OBS Screen Recording permission
you should see the may sources in Window Capture now
terminal
open /Applications/OBS.app/Contents/MacOS/OBS --args -picture
here is the fix for the above
1) add a Display Capture in Source. Catalina will ask for Screen Recording permission
2) Allow OBS Screen Recording permission
you should see the may sources in Window Capture now