Last year I bought a pair of Bose AE2 SoundLink headphones, no small purchase.
For a year now they have paired will with my MacBook mid-2015.
Now they do not, even though the Bluetooth feature on MacBook sees the headphones and prepares them for connection. The little voice inside the headphones no longer says "pairing with such and such MacBook Pro" even though My MacBook is seeing the headphones.
Any ideas why or what could be the problem? For example, would going from Sierra to High Sierra affect that?