[MBCook]

The article sounded to me like Apple had a private fork with extra tooling to help with their kernel work.

[cbsmith]

Heh... and it was just a few weeks ago I was assured that all of the platform internals were fully open sourced. ;-)

[pjmlp]

I doubt that they have opened the custom C compiler used in iBoot for example.

https://support.apple.com/guide/security/memory-safe-iboot-i...

[saagarjha]

They have not.

[roblabla]

A lot of the internals are, but certainly not all. And they always lag behind with what is currently released, sometimes by several months.

[cbsmith]

It's funny, that's pretty much what I said...