Feature: support "Now Playing" system indicator

[00dani]

As far as I can tell there's currently no way to make mpd a "Now Playable" application on MacOS. This is a problem because if there is no "Now Playable" app active, then the system unavoidably defaults to Apple's own Music.app, which I never want to use. It automatically opens Music.app when Bluetooth headphones are connected, for example, rather than resuming mpd playback.

I'm not especially familiar with MacOS-specific app development, but I looked up Becoming a Now Playable App in Apple's documentation and it doesn't look too complicated? 🤔

(Sorry for posting an incomplete issue and then editing it to actually have a full description. I hit the wrong key, I think. 😳 )

[danbee]

@00dani Thanks for this, I didn't even know it was a thing!

[l2dy]

I think this is basically #77?

[00dani]

@l2dy It looks like it might be! I'm not entirely certain #77 does all that's necessary to become Now Playable - the sample project Apple provides seems to extend from a NowPlayable interface that isn't used in #77 for example - but it's at least very close? 🤔