PureDarwin: a project to make darwin more usable
PureDarwin: a project to make darwin more usable

github.com
GitHub - PureDarwin/PureDarwin: Darwin is the Open Source core of macOS, and PureDarwin is a community project to extend Darwin into a complete, usable operating system.

Darwin is the core of MacOS that is open sourced. It's not really usable out of the box but this project attempts to change that.