English

macOS

MacOS comes from English Mac ‘Macintosh’.

attested reconstructed ? uncertain or disputed

Earlier history not traced here.

Lineage

A compound of Mac ‘Macintosh’ + OS ‘operating system’

English Macintosh

English Mac

Proto-Indo-European *h₃ésth₁ ‘bone’

Latin os ‘bone’

English OS

Every English word from English Mac

name A major operating system, formerly known as OS X (and before that as Mac OS X), used on laptop and desktop computers by Apple Inc.

Language periods are conventional ranges, not dates for this word.