Logic Pro x preference select Plugin Manager, under ToonTracks – EZBass compatibility should indicate ‘successfully validated”, if not
select EZBass and press the “reset and rescan” button below.
The above steps helped me in similar problem with some other plugins so it should work for you too. In my case EZBass didn’t create any issues in logic pro x though it is not working in MainStage 3.
Reply To: After installation EZBASS not appears in my DAW (Logic Pro) version: 1.0.2 Operating system: macOS Catalina (10.15)