Since updating to macOS 11.2 (and on 11.3 beta) i am no longer able to use Airplay to play on my Sonos speakers. What happens is:
- From Mac, open iTunes or other source of audio.
- Click sound output selector either in app, or from toolbar, or in System Preferences-Sound-Output and select the Sonos speakers.
- The sonos speakers are visible and able to be selected but the checkbox turns into a spinner sometimes, and in any event no sound is heard on the speakers. Once the output is set back to Computer Speakers it can be heard again.