As soon as I upgraded to macOS Sierra a few days ago, my Bluetooth playback has been so choppy/buggy that it is entirely unusable. Playback will be as normal for 2-10 seconds, then cut completely for a few seconds, then cut back in, and so on.
I am connected to a Sony Bluetooth speaker, to which I can confirm that other OS X (El Capitan) and Android/iPhone devices can stream audio to without incident.
I do not have any other Bluetooth speakers to test on, but I strongly feel it's the fault of the macOS Sierra machine, not the speaker.
I am not using any 3rd party or custom audio routing internally, it's literally just routing audio output to the Bluetooth speaker as normal. I've already reset SMC and PRAM, doesn't help whatsoever.
Has anyone else encountered this? If this is a genuine bug in macOS Sierra, it seems like a massive oversight.