The Apple III, introduced in May 1980, was intended to dominate the desktop computer market. I.B.M. would not introduce its original personal computer until 1981. But the Apple III had a host of technical problems, and Mr. Jobs shifted his focus to a new and ultimately short-lived project, an office workstation computer code-named Lisa.
By then Mr. Jobs had made his much-chronicled 1979 visit to Xerox’s research center in Palo Alto, where he saw the Alto, an experimental personal computer system that foreshadowed modern desktop computing. The Alto, controlled by a mouse pointing device, was one of the first computers to employ a graphical video display, which presented the user with a view of documents and programs, adopting the metaphor of an office desktop.
“It was one of those sort of apocalyptic moments,” Mr. Jobs said of his visit in a 1995 oral history interview for the Smithsonian Institution. “I remember within 10 minutes of seeing the graphical user interface stuff, just knowing that every computer would work this way someday. It was so obvious once you saw it. It didn’t require tremendous intellect. It was so clear.”
In 1981 he joined a small group of Apple engineers pursuing a separate project, a lower-cost system code-named Macintosh. The machine was introduced in January 1984 and trumpeted during the Super Bowl telecast by a 60-second commercial, directed by Ridley Scott, that linked I.B.M., then the dominant PC maker, with Orwell’s Big Brother.
A year earlier Mr. Jobs had lured Mr. Sculley to Apple to be its chief executive. A former Pepsi-Cola chief executive, Mr. Sculley was impressed by Mr. Jobs’s pitch: “Do you want to spend the rest of your life selling sugared water, or do you want a chance to change the world?”
He went on to help Mr. Jobs introduce a number of new computer models, including an advanced version of the Apple II and later the Lisa and Macintosh desktop computers. Through them Mr. Jobs popularized the graphical user interface, which, based on a mouse pointing device, would become the standard way to control computers.
But when the Lisa failed commercially and early Macintosh sales proved disappointing, the two men became estranged and a power struggle ensued, and Mr. Jobs lost control of the Lisa project. The board ultimately stripped him of his operational role, taking control of the Lisa project away from him, and 1,200 Apple employees were laid off. He left Apple in 1985.
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