Twenty-five years ago, the computer revolution’s marquee company was in decline. Back then, it was just settling into shiny new headquarters, a campus of six buildings that formed a different kind of ring. Called Infinite Loop, the name is a reference to a well-known programming error—code that gets stuck in an endless repetition—though no one seems to kn ow who applied it. Infinite Loop was the place where Apple’s leaders and engineers pulled off a historic turnaround, and it will always be the source of stories and legends—many of them untold. Until now.