Apple will replace Tim Cook with hardware engineering chief John Ternus on Sept. 1, ending a 15-year run at the top of the world's most valuable consumer-electronics company and handing the $4 trillion business to an executive whose first assignment will be closing a widening gap in artificial intelligence. The company announced the change Monday.
Ternus, 50, becomes only the second Apple chief executive since Steve Jobs departed in 2011. He inherits a company that still sells iPhones in record volumes but has largely sat out the capital-spending arms race that has pushed Microsoft, Alphabet, Amazon and Meta to commit hundreds of billions of dollars to AI data centers. The succession sets up a test of whether Apple's device-first playbook can survive a shift in how consumers use technology, and whether Cupertino can catch up in generative AI without abandoning the privacy posture that has defined the Cook years.
What changes
Cook will move to executive chairman on Sept. 1, according to Apple's announcement. Ternus, currently senior vice president of hardware engineering, has spent 25 years at the company and, in Apple's telling, played an instrumental role in "the introduction of multiple new product lines, including iPad and AirPods, as well as many generations of products across iPhone, Mac, and Apple Watch." The press release announcing the transition did not mention AI.
That omission lands at an awkward moment. Apple's in-house AI effort, Apple Intelligence, launched in 2024 with image generators, text rewriters, notification summaries and an integration with OpenAI's ChatGPT. Consumer response has been mixed. A major upgrade to Siri, powered by Google's Gemini, is expected later this year following a delay. On Apple's own App Store, ChatGPT and Anthropic's Claude are the two most popular free iOS apps, with Gemini at fourth and Meta AI at eighth, according to CNBC.
The hardware bet
Picking a hardware executive rather than a services or software chief is itself a signal. Timothy Hubbard, assistant professor of management at the University of Notre Dame, told CNBC: "By choosing a hardware leader in John Ternus, Apple may be signaling that it still believes the future of AI will run through tightly integrated devices, not just software".
Apple has been embedding AI-capable silicon in its devices since 2017 and is wagering that, within a few years, heavier AI workloads will run on the phone itself rather than in distant data centers. Bloomberg reported in January that Apple is accelerating three AI wearables built around Siri: smart glasses, a pendant and AirPods with cameras. A foldable iPhone is also in the pipeline. Ben Bajarin, CEO of Creative Strategies, called the foldable "the most consequential hardware moment in years" and told CNBC in March that "I think the biggest question is what comes after the iPhone".
For now, the iPhone is doing the work. iPhone revenue rose 23 percent from a year earlier to $85.3 billion in the latest quarter, which Apple attributed to strong demand for the iPhone 17 line released in September. Cook said at the time that iPhone demand was "simply staggering." Apple reports fiscal second-quarter results next week, with Cook still in the chief executive's chair.
On the Street
Reaction from Apple's largest shareholder was effusive. Warren Buffett, chairman of Berkshire Hathaway, told CNBC's Becky Quick that "Apple would not be the Apple of today without Tim Cook". Buffett added: "What he has done with Apple could not be done by anybody I've known". Berkshire's Apple stake is its largest single holding.
Other investors are watching Ternus for a clearer AI pitch. Gene Munster of Deepwater Asset Management told CNBC's "Closing Bell: Overtime" on Monday that his firm had recently added to its Apple position on the company's prospects in "personalized AI." Munster said: "There's an opportunity for Apple to tell a story to investors that could be quite compelling that they're going to get this".
Forrester analyst Dipanjan Chatterjee was more cautious, telling CNBC that in the coming years "the seas will be turbulent for Apple because there's been so much change in how consumers interact with technology," particularly with generative AI.
The Washington chorus
President Trump praised Cook in a Truth Social post early Tuesday, writing that Cook "had an AMAZING career, almost incomparable, and will go on and continue to do great work for Apple, and whatever else he chooses to work on. Quite simply, Tim Cook is an incredible guy!!!" OpenAI chief executive Sam Altman, whose company partnered with Apple in 2024 to integrate ChatGPT into Siri and Apple's writing tools, posted on X that "Tim Cook is a legend".
The counterpoint
Tuesday's reporting on the succession came from center-lean outlets; left- and right-leaning perspectives on the move were not represented in the accessible sources. Skeptics can point to the facts CNBC laid out: Apple has punted on a foundational AI model, is paying Google to power its flagship voice assistant, and announced a generational leadership change without using the words artificial intelligence in the release. Hubbard told CNBC: "The very strengths that made Apple dominant — that rapid innovation is where Apple started, and maybe that's where the company needs to return".
Ternus has four months to sketch an answer. The first public test comes next week, when Apple reports fiscal second-quarter earnings and analysts get their first chance to put the AI question to the incoming chief executive.