To pair with anything other than iOS devices (or if the AirPods still won’t pair to your Mac) follow these steps. With the earbuds still in the case:
Flip open the lid so that the earbuds are exposed.
Without removing the earbuds, turn the case around and locate the small setup button towards the bottom.
Press and hold the button until the small LED light on the case begins blinking.
The AirPods is now in pairing mode. From here, go into the Bluetooth settings on your device and tap on the AirPods.