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systemd really, really sucks
(ser1.net)
From Wikipedia, the free encyclopedia
Linux is a family of open source Unix-like operating systems based on the Linux kernel, an operating system kernel first released on September 17, 1991 by Linus Torvalds. Linux is typically packaged in a Linux distribution (or distro for short).
Distributions include the Linux kernel and supporting system software and libraries, many of which are provided by the GNU Project. Many Linux distributions use the word "Linux" in their name, but the Free Software Foundation uses the name GNU/Linux to emphasize the importance of GNU software, causing some controversy.
Community icon by Alpár-Etele Méder, licensed under CC BY 3.0
Linux is not really a descendant of Unix. It is a Unix clone, but its roots do not trace back to Unix.
OSX comes from FreeBSD, which came from BSD, which had to rewrite everything that they got from UNIX thanks to copyright trolls
Beyond that OSX just happens to be unix-like, apple couldn't give less of a fuck about it being unix-like
OSX also came from NextStep which came from the original BSD Unix. They used FreeBSD as well. OSX is also certified Unix starting from leopard. This year apple did not renew the certification, so later releases of macOS are not Unix, but Unix-like.