Tim Cook Interview: The iPhone 6, the Apple Watch, and Remaking a Company's Culture

Steve Jobs’s office remains Steve Jobs’s office. After his death in 2011, Tim Cook, his friend and successor as Apple chief executive officer, decided to leave the sparsely decorated room on the fourth floor of 1 Infinite Loop untouched. It’s not a shrine or place of mourning, but just a space that Cook sensed no one could or should ever fill. “It felt right to leave it as it is,” he says. “That’s Steve’s office.”

Almost everything else on Apple’s campus in Cupertino, Calif., is different. The executive wing once radiated nervous energy, with handlers scurrying to anticipate the whims of Apple’s temperamental co-founder. Now there’s tranquility in the hallways, a reflection of the new boss’s calm Southern demeanor. Downstairs, the cafeterias are packed—the workforce has almost doubled. A mile away, behind a ring of fences, construction crews are building the massive foundation for the circular “spaceship” campus that will accommodate 12,000 workers when it’s completed in a few years.