I don't follow Apple open source, so I have a lot of questions: What parts of MacOS are open source, and which are not? How is it licensed? Why is this on their website rather than GitHub?
> rather than GitHub?
Just to note that Swift is on GitHub[0] and has a very inclusive community.
The impression I get is that Apple isn't really interested in soliciting outside contributions for their OS/kernel code, which is why they're just code dumps.