[tkocmathla]

What?

https://github.com/apple

[dgellow]

Also, check https://opensource.apple.com/projects/

[rcbdev]

I genuinely didn't know about their OSS efforts, thanks!

[Thev00d00]

I wouldn't go so far as efforts, so much as legally required publication of 3rd party code they use, or open wrappers to their proprietary libraries

[mort96]

Or .. their operating system and kernels