macOS

• This is a reference note so that various other notes can link back to it - usually as a point of contrast for how things differ compared to Linux
• Be sure to check the Backlinks of this note
• Darwin is an open-source BSD-derived platform, running on the Mach-derived XNU kernel, with a combination of GNU and Apple Userland on top of it
  • This core is used for all Apple operating systems, including macOS, iOS, watchOS, tvOS, etc.
  • Because it’s BSD-based, it’s largely POSIX-compliant
  • Tends to also use the BSD versions of the GNU Userland