FreeBSD is not a distro. It's not even Linux; it's a completely different kernel and operating system that traces back to even before Linux. It's honestly closer to Darwin than it is to Linux; macOS is technically a BSD. (Not FreeBSD though.)
Darwin is its own thing really. There are parts from BSD, there are also parts from Mach and there are also unique parts.
Darwin is its own thing really. There are parts from BSD, there are also parts from Mach and there are also unique parts.