Answered
Loss Of Volume Control With Mac OS Sequoia 15.0 Update
I updated my iMac to Sequoia 15.0 yesterday. I have now lost control on volume of my Sonos systems regardless of the app I use for playback. Whether I use the volume control on the Sonos app, Apple Music (iTunes) app or the Roon app when I set to the volume to the level I wish to listen it will in seconds automatically reduce the volume significantly to a very low volume level. It does not matter at what volume level I set it it reduces to the one singular volume level.
