Does this mean Apple will license this and include it in macOS the way it does (presumably) with Helvetica and Helvetica Neue? I really have no idea how something like this happens.
Apple no longer use this front. They have created their own font, San Francisco, and started using it 3 to 4 years ago.
Edit: oh, I misunderstood! Apple might start using it, but they are not compelled to. A lot of other fonts such as Palatino have also been updated, but Apple doesn’t include them (yet).
Its not installed as an available font in MacOS, even though the its used for the UI. You can get it here if you want to use it within their licensing guidlines:
https://developer.apple.com/fonts/