John Ternus is officially Apple’s new CEO, ending Tim Cook’s 15-year run at the top of the world’s most valuable technology company. The 51-year-old engineer becomes the eighth person to lead Apple and the first engineer to hold the position since Steve Jobs.
Cook spent his final day as CEO writing to Apple employees rather than outlining the company’s next product or technology strategy. His farewell memo focused heavily on culture, leadership and the people behind Apple’s success, while making clear that he believes Ternus is ready to take the company forward.
Cook described Ternus as “brilliant and wonderful and capable” and said few people understand what it takes to build world-changing products as well as his successor. He also made clear that he is not leaving Apple entirely, as he will remain with the company as executive chairman.
Who is John Ternus?
Ternus joined Apple in 2001 as an engineer after studying mechanical engineering at the University of Pennsylvania. His early work included Apple’s Cinema Display and G5-era iMacs before he became vice president of hardware engineering in 2013.
Over the years, he became closely involved with Apple’s major hardware products. His work has touched generations of the iPad, iPhone, Mac and Apple Watch, as well as products such as the first AirPods.
That background makes Ternus a very different kind of CEO from Cook. He is not known for being a theatrical showman, but he has spent years presenting Apple products on stage and leading one of the company’s most important engineering organizations.
His promotion also gives Apple an engineer at the top for the first time since Steve Jobs. That distinction matters because Ternus will now have to balance Apple’s enormous existing business with decisions that could define its next decade.
Ternus has already spoken about Jobs’ philosophy
There is an interesting connection between Ternus and Cook’s final messages. In a 2024 commencement speech at the University of Pennsylvania, Ternus told graduates to “make a dent in the universe” — one of Steve Jobs’ most recognizable phrases.
Two years later, Cook used the same idea in his final message as CEO. He wrote that Apple had managed to leave its “dent in the universe” because of who the company is and what it believes.
The connection is striking because Ternus is now taking over a company whose identity remains deeply connected to Jobs. Cook spent 15 years protecting and expanding that legacy, while Ternus must now decide what parts of it belong in Apple’s future.
Cook leaves behind a transformed Apple
Ternus is inheriting a company that looks very different from the one Cook took over in 2011. Apple was worth less than $350 billion when Cook became CEO, compared with roughly $4.6 trillion today.
Apple’s revenue has also expanded dramatically, while services have become one of its biggest businesses. The company’s services division generated more than $109 billion in fiscal 2025, turning an area that barely existed under Jobs into a major source of revenue.
That success gives Ternus an enormous foundation to build on. It also creates a difficult comparison, because Cook’s tenure produced one of the biggest periods of value creation in corporate history.
The challenge now is not simply keeping Apple successful. Ternus has to convince investors, employees and customers that Apple can create its next major growth story under a leader with a very different background.
Ternus inherits Apple’s biggest problems
The new CEO takes over at a complicated moment. Apple is facing pressure around artificial intelligence, executive turnover, product development and its ability to maintain the pace of innovation that defined previous eras.
The AI challenge is particularly important. Apple delayed its major Siri overhaul and has turned to Google’s Gemini technology for part of the next generation of its assistant.
At the same time, Apple has experienced significant changes across its leadership and design teams. Ternus has already spent months reshaping parts of the executive structure, suggesting that his transition will involve more than simply changing the name on the CEO’s office.
He will also have to decide how aggressively Apple should pursue new categories such as artificial intelligence, foldable devices, smart home technology and mixed reality.
Tim Cook is not really leaving
Cook’s departure from the CEO role does not mean the end of his influence at Apple. He remains executive chairman and is expected to focus heavily on relationships with governments and policymakers.
That creates an unusual leadership arrangement. Ternus now has final responsibility for Apple’s operations and product strategy, while Cook remains inside the company and continues to play an important role.
For now, both men appear committed to making the transition work. Cook has publicly expressed confidence in his successor, while Ternus inherits the position after years of working inside Apple’s leadership structure.
His first major test is already approaching.
Apple is expected to hold its next iPhone event on September 9, giving Ternus barely more than a week in the CEO role before stepping onto one of the biggest stages in technology.
The Cook era is over.
Now John Ternus gets the chance to make his own dent in the universe.
