These operating systems are collectively referred to as Classic Mac OS. You will want to refer to the wiki's PowerPC information as it contains potentially newer information beyond this article.īefore macOS, Apple sold Macintoshes with an operating system called System Software throughout its early lifespan, but the name only changed to Mac OS until version 8 in 1997.
This page applies to version 9.2.1 of Mac OS, an obsolete version.
