is a community-driven project that aims to create a usable, bootable operating system based on Darwin , the open-source foundation of Apple’s macOS. While macOS is a proprietary system, its core—including the XNU kernel and various system-level libraries—is released under open-source licenses. PureDarwin attempts to "fill in the gaps" left by Apple’s closed-source components (like the Aqua user interface) to provide a functional, independent OS. The History of PureDarwin
: A hybrid kernel combining the Mach microkernel (for IPC and memory management) and elements of BSD (for networking and POSIX compliance). puredarwin os