Darwin, in the open.

darwinOS is a community-driven effort to turn Darwin — the open-source foundation underneath macOS and iOS — back into an operating system you can build, boot, and contribute to.

What's in the box

New here?

Boot darwinOS in a VM, build from source, and take a tour of the codebase.

Help build it.

Ways to contribute — whether you write C, Swift, Objective-C, or don't code at all.

What works today?

The support matrix — architectures, hardware, and features — tracked honestly as the project moves.