So technically, there isn’t a “Mac OS 1.0,” only System 1.0.

Originally, Apple didn’t publicize the version numbers of the system software and referred to it as just “System 1.0” or “System 2.0” internally. Over time, Apple has referred to its Macintosh operating system by different names. RELATED: 35 Years of Microsoft Windows: Remembering Windows 1.0 What’s in a Mac OS Name? Despite that, what set the Mac apart most was its innovative operating system, which went on to inspire how Windows works as well. It also pushed the state-of-the-art forward in user interfaces with a completely bitmapped display and support for proportional fonts.Īt the time of its launch, the IBM PC had not yet turned three years old, but Apple found itself on the defensive, running to catch up in market share, as IBM’s PC had already been hailed as the new industry standard for business-class PCs. It brought the graphical user interface (GUI) concept to the masses for the first time and promised a very user-friendly experience compared to most computers on the market.

Released in 1984, the Apple Macintosh radically altered the course of personal computer history.