Walter Bright wrote:
Jacob Carlborg wrote:
They call it "Mac OS", then they add a version like this: "Mac OS 9".
Then when the tenth versions came it happened to be built on a nix
base/core (known as darwin) and they also added the X (probably to
reflect the new nix base, "X" is also ten using roman numerals) making
it: "Mac OS X". They still call it "mac os ten" (though some people,
including me, like to call it "mac os x" and pronounce the "x" as in
the letter "x"). After the "x" they add a name to reflect the version
i.e. "Leopard" for version 10.5. Sometimes they refer to the os
version with the name and sometimes with the version number.
Apple calls it "Mac OS X version 10.5".
There is little consistency in how Apple names their OSs, so there is no
way to come up with a version identifier for it that is completely
consistent.
About the "darwin" vs "OSX". There are other operating systems than Mac
OS X that could use "darwin" as the version identifier if someone made a
D compiler available. iPhone OS (this is just Mac OS X on the iphone and
ipod thouch but it's called iPhone OS) and GNU/Darwin for example.