On August 24, 2026, Apple quietly marks the 15th anniversary of Tim Cook officially becoming CEO, following Steve Jobs’ resignation on August 24, 2011. That date also kicks off the final stretch of Cook’s term; as of September 1, he’ll pass the CEO role to John Ternus while transitioning into the newly expanded role of executive chairman.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
Cook’s tenure as CEO has been defined by growth, global expansion, and an intensifying regulatory landscape. While the company prepares to unveil the iPhone 18 Pro and its first foldable iPhone, the leadership handoff comes at a moment when Apple is navigating product innovation alongside geopolitical pressure.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
Who Is John Ternus?
John Ternus has been an insider at Apple since 2001, starting in product design. Over the years, his portfolio grew — by 2013 he was vice president of hardware engineering; in 2021 he became senior vice president. His span of influence stretches across Apple’s hardware lineup, overseeing development of AirPods, Mac, iPad, and iPhone.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
On the other hand, Cook will remain pivotal, albeit in a different sphere. As executive chairman, he’ll focus on policy, regulatory affairs, and representing Apple in high-level external matters. The internal leadership reins move fully to Ternus on September 1.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
Why This Transition Matters
Leadership changes at Apple aren’t frequent events. Steve Jobs’ resignation in 2011 marked one of the most seismic shifts in tech leadership, and Cook held the role ever since. This new era arrives as Apple stands on the cusp of introducing its iPhone 18 Pro lineup and executing a long-awaited foldable model. Product strategy is evolving rapidly, and there’s renewed emphasis on innovation under pressure.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
The shift also signals Apple’s growing acknowledgment of regulatory challenges. Cook moving into an executive chairman role with a focus on policy suggests Apple is doubling down on external-facing leadership. Meanwhile, internal product execution will now rest with Ternus, whose background in hardware engineering has prepared him for the stage.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
This transition reflects broader patterns in Big Tech, where leadership evolution is increasingly tied to regulatory, geopolitical, and supply-chain risks. Apple’s new dynamic between Ternus and Cook could serve as a model for balancing innovation with oversight. Expect to see how this plays out when the iPhone 18 Pro and Apple’s first foldable phone hit the market.([macrumors.com](https://www.macrumors.com/2026/08/24/tim-cook-replaced-steve-jobs-15-years-ago-today/))
