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> They turned one of the numbers into a letter then started numbering again. They did not. It has been MacOS X 10.0 through macOS 10.15. In never was X.1 or an

• MBCook 10mo ago
  Right. MacOS X was the marketing name. But it was pronounced 10, just a stylization with Roman numerals. The version number the OS reported always said 10.whatever. Exactly as you said.
  • kergonath 10mo ago
    Yes, and you did sound silly when saying it out loud the official way (OS ten ten ten was a famous one, for Yosemite).
    • lostlogin 10mo ago
      I stand corrected. I thought the X(10) was part of the version number, not a prefix that got added.
      • MBCook 10mo ago
        I’m not sure I hear people call MacOS X 10.10 “ten ten ten”. I think I remember them calling it “ten ten” verbally. So you’d say “MacOS ten ten”. At least that’s what I’m used to, it is entirely possible that’s what other people said and you would write it that way. No one wrote “MacOS X.10” or “MacOS X .10” but they would write “MacOS X 10.10”. So yeah it’s all a bit of a mess. There’s a reason people often use the name of the release, like Snow Leopard or Tahoe, instead of the number numbers.