In general, Google Chrome works best and Safari works worst. Opera usually doesn't encounter many problems and users have reported good experiences with Firefox. In any case it is always a good idea to use the most current browser version available.
(Jitsi is based on webRTC, which is not supported by older browsers)
Alternatively there is also the App Jitsi-Meet for OSX and Windows: https://github.com/jitsi/jitsi-meet-electron/releases