Since upgrading my Late-2013 15" Retina MacBook Pro to macOS High Sierra from Sierra, I've noticed that the media keys (play, next, previous) work for media in playing in Safari and Mail as well as iTunes/Quicktime/etc. But now sometimes the keys just stop responding or doing anything.
Is there any way to fix this issue?
Best Answer
You'll probably need to wait for Apple to fix this. I've noticed that when I run into this, if I restart the last application the media keys were affecting they sometimes start working again.
For example, I had been watching YouTube videos in Safari and then started listening to music. I couldn't get the media keys to work for iTunes and they weren't working YouTube either. Quitting Safari allowed them to work for iTunes again. Starting Safari again didn't break this.