Recently the audio on my Mac sometimes stops working for an unknown reason… It‘s been happening with video in browsers and Tweetbot. I'm not sure what it is and where it‘s coming from, but here‘s a quick fix that has worked for me.
- Open Terminal, type
sudo killall coreaudiod
- Press return (⮐)
- Start playing audio ;)
Obviously this is not the works-all-solution, but can be a possible quick fix.