Tim Cook Steps Down as Apple CEO After 15 Years, John Ternus Takes Over

Tim Cook’s time as Apple chief executive is over. After 15 years in the job he inherited from Steve Jobs, Cook stepped aside on September 1 and handed the role to John Ternus, the company’s longtime hardware engineering leader.Cook is not leaving Apple. He becomes executive chairman and is expected to keep working on government and policy relationships, including ties with Washington and Beijing. Arthur Levinson, who had been non-executive chairman, becomes lead independent director. Ternus joins the board.The change was announced in April and completed this week, just days before Apple’s September 9 product event. That event will now belong to Ternus, not Cook.The End of a Rare RunCook became CEO in August 2011, weeks before Jobs died. Many people doubted that an operations executive could replace a founder who had become a cultural symbol. The results settled that argument.Under Cook, Apple’s annual profit rose to more than $110 billion. The company’s market value grew from roughly $350 billion to about $4 trillion. It became the first U.S. public company to reach $1 trillion, then $2 trillion, $3 trillion, and later $4 trillion. More than 2.5 billion people use Apple devices.Those numbers are only part of the story. Cook turned Apple from a hit-product company into a global machine: supply chain, retail, services, chips, and a political operation large enough to match its economic weight.In a note to employees on his final day as CEO, Cook said he was not leaving Apple but was stepping away from a role he had loved deeply. He said he would miss the work and was at peace with the decision.Who John Ternus IsTernus, 50, joined Apple in 2001 on the product design team. He became vice president of hardware engineering in 2013 and senior vice president in 2021. In that job he oversaw the engineering behind the iPhone, iPad, Mac, and other devices.He is the third Apple CEO since Jobs returned in 1997. He is also an Apple lifer, which is the point. The board chose continuity. Ternus is an engineer with a public profile inside the company and a reputation for detail. Cook called him a brilliant engineer and thinker, obsessed with every detail, and the right person to lead Apple into the future.Ternus’s old hardware brief has been split and expanded. Johny Srouji, previously senior vice president of hardware technologies and a central figure in Apple’s custom-chip work, became chief hardware officer.The first big test is immediate. Apple’s next event is expected to include the iPhone 18 Pro lineup and, according to widespread reporting, a foldable iPhone. Ternus will be the face of that launch.What Cook BuiltCook’s Apple was less theatrical than Jobs’s Apple and more complete. The iPhone remained the core. Around it Cook added the Apple Watch, AirPods, a services business that grew past $100 billion, and a custom silicon strategy that remade the Mac.He also professionalized the company. Inventory discipline, supplier management, and scale were his original strengths. Those skills mattered more as Apple became a manufacturer of hundreds of millions of devices a year and a retailer with stores on every continent that mattered.Services changed the financial shape of the company. App Store fees, iCloud, Apple Music, Apple TV+, and other subscriptions made Apple less dependent on a single hardware cycle. Hardware still dominates the brand. Services made the profits more durable.Cook’s public identity was quieter than Jobs’s. He spoke about privacy, the environment, and civil rights. He also became one of the most important corporate diplomats in American business, moving between U.S. politics and Chinese manufacturing reality.The Job Ternus InheritsThe new CEO takes over a company that is richer and more powerful than the one Cook inherited, and more constrained.Apple is widely seen as behind in generative AI. Rivals spent years building models and assistants while Apple moved more slowly and more cautiously. That gap is now a central business problem, not a side debate. Customers compare Siri and Apple Intelligence with systems from Google, OpenAI, and others. Ternus will be judged on whether Apple can close that gap without abandoning its privacy pitch.China is the other hard problem. It is a huge market and a huge manufacturing base. U.S. political pressure to move production home has grown. Cook spent years managing that contradiction. As executive chairman he is expected to keep doing some of that work. Ternus still has to run a company whose products, factories, and sales are entangled with both governments.Design is a third test. Some people inside and around Apple have argued that the product line needs a more visible shake-up after years of incremental updates. Ternus comes from hardware, which may help if the next era is about foldables, new form factors, and a different visual language. It may not help if the real race is software and AI.Cook as Executive ChairmanThe new structure looks like other late-era founder or long-CEO handoffs at Amazon and Netflix: the old chief stays close, with a board title and selected duties.Cook has said Apple will remain his first priority. Reporting has described his brief as including relationships with the White House and the Chinese government. That is not a ceremonial assignment. Apple’s ability to sell iPhones, make iPhones, and avoid becoming a bargaining chip depends on those relationships.The risk of this model is confusion. Employees and governments need to know who is in charge. The opportunity is experience. Few people on earth know Apple’s political and operational map as well as Cook.A Transition Timed to a Product CycleApple rarely separates leadership news from product news for long. The September 9 event will tell the market whether Ternus intends to sound like Cook or like a hardware chief with a freer hand.If the company shows a foldable iPhone and a stronger AI story, the leadership change will look planned and confident. If the event is another year of refinement, investors will ask whether a new CEO changes anything that matters.Cook will not be the host. That alone is a historic shift. For a decade and a half, Apple’s biggest stages were his.How History Will Measure HimCook will be remembered first as the person who proved Apple could survive Jobs. That was not obvious in 2011. He then made the company larger than almost anyone thought a consumer-electronics firm could become.He will also be remembered for what he did not do. Apple did not invent the current wave of generative AI. It did not produce a new category as defining as the iPhone. It became a services giant and a silicon company while remaining, in the public mind, the iPhone company.Those are not small achievements. They are different achievements from the ones Jobs was known for. Cook’s talent was scale, systems, and composure. Ternus’s test is whether that machine can still invent.What Happens NextOn paper, September 1 is an orderly handoff. In practice, the next 12 months will decide if it was also a strategic one.Watch three things. First, the September event and whether Ternus uses it to set a new product tone. Second, Apple’s AI roadmap and whether users notice a difference. Third, how much authority Cook actually keeps when a political or supply-chain crisis arrives.Tim Cook stepped down as CEO after 15 years. He leaves one of the most successful corporate tenures in American history and a successor who has spent his whole adult career inside the same walls. The Cook era is over. The Apple era he built is the one John Ternus now has to run.