On a MacBook Pro with the Latest Sierra. Dication and enhanced dictation is on. I tried trashing the relatated pref file turning off dictation, rebooting then turning dictation back on. Siri can hear me ok and responds normally. Currently I'm using the internal mic and speakers, which work fine for Skype. If I open up TextEdit and press the function key twice I get the little microphone icon as well as a tone. But that's a far as it goes, no text will input when I start speaking. Had a look around the interwebs and it seems I've done everything that should make it work, and indeed it looks like it wants to work, but it will not respond.