Mac OS

Basic Information
Type(s)	Operating System Family
Developer(s)	Apple, Inc.
Status(es)	Released
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Mac OS refers to a series of operating systems used by the Macintosh family of computers developed and released by Apple, Inc. prior to the release of Mac OS X (that would later be referred to as OS X and macOS). These operating systems were released between 1984 and 2001. Originally referred to as System Software in its earliest releases, Apple rebranded it as Mac OS with 7.6.