This is really frustrating me. I have a Microsoft Sculpt USB keyboard and have just got a new Macbook Pro with touch bar, and it is just not pairing with the keyboard.
The first time I connected the keyboard, I got a keyboard setup assistant dialogue as described in this question prompting me to press some keys on the keyboard to set it up. When I press the keys as requested, nothing happens.
Now, nothing pops up, and the keyboard is just completely unresponsive. However, I can see the keyboard is there as one of my input sources when I click 'Modifier Keys...' in my keyboard system preferences: .
Really pretty stuck on what to do here. I can't find any drivers or other settings that I might change to fix this.