The Macintosh (MAK-in-tosh; branded simply as Mac since 1998) is a family of personal computers designed, manufactured and sold by Apple Inc. since January 1984.

The original Macintosh was the first mass-market personal computer that featured a graphical user interface, built-in screen and mouse. (Although the Sinclair QL became available one month before the Macintosh family and thus was technically the first home computer with a graphical user interface, the QL never attained widespread commercial success.) Apple sold the Macintosh alongside its popular Apple II family of computers for almost ten years before they were discontinued in 1993.

Early Macintosh models were expensive, hindering its competitiveness in a market dominated by the Commodore 64 for consumers, as well as the IBM Personal Computer and its accompanying clone market for businesses. Macintosh systems found success in education and desktop publishing and kept Apple as the second-largest PC manufacturer for the next decade. In the early 1990s, Apple introduced the Macintosh LC II and Color Classic which were price-competitive with Wintel machines at the time. However, the introduction of Windows 3.1 and Intel's Pentium processor which beat the Motorola 68040 in most benchmarks gradually took market share from Apple, and by the end of 1994 Apple was relegated to third place as Compaq became the top PC manufacturer.

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