OS X

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English

Etymology

Ellipsis of Mac OS X; from OS (operating system) + X (ten, Roman numeral), as a successor to Mac OS 9.

Pronunciation

Proper noun

OS X

  1. (computing, trademark) Former name of macOS; itself formerly known as Mac OS X.

References

  • “What is an operating system (OS)?”, in Apple Support, 14 November 2007, archived from the original on 2009-02-26:
    The current version of Mac OS is Mac OS X (pronounced "Mac O-S ten").

Anagrams