Has anyone lost their sound with beta 5? I have a MacBook Pro (Retina, Mid 2012) and have lost all sound. Restart and reset PRAM have on effect. Any suggestions? Tunes play in iTunes, but no sound in Safari, Firefox etc...
Indeed, same problem since the start of the beta on a MacBook Air (mid-2011). I have also reset PMU and did two clean installations. I also have a late 2013 MB Air without the issue. I have provided feedback and screen shots of the Sound panel via the feedback app through each iteration, but no joy or suggestions from Apple.
Sorry I cannot be of help, but let us hope Apple takes notice since it seem they don't care much for anything you cannot hold in your hand these days!
I've got the same effect. And when I came to check status of my sound devices in System Preferences I've found there are no one of them! No speakers, no digital output. So I have no chances to correct the situation but full re-install of sound driver.
May be this one would help: https://forums.developer.apple.com/thread/86582
