Not sure if this is the right forum. I have 2019 iMac running macos 10.15.6 and is up to date. Yesterday the volume dropped while watching a Youtube video. I rebooted, and same. Rebooted in safe mode and no sound. Tried Music and it says there are no speakers. The volume settings are up around 3/4 and not muted. Tried resetting the nvram (?) and that didn't help. Sound works just fine in Chrome. So I get low volume in Safari, no volume in Music, and no issues in Chrome. Anyone have any ideas?