John Ternus takes over as Apple CEO on Tuesday, inheriting a company that dominates the smartphone market but lags behind rivals in artificial intelligence. One of his biggest challenges will be balancing the company’s dependence on China while avoiding acute political pressure from the White House. 51, joined Apple’s design team in 2001 and rose to senior vice president of hardware engineering, reporting to Cook. He leads the engineering teams behind Apple’s entire product line, including the iPhones that generate the majority of the company’s revenue. It barely has a week to settle in, as Apple will hold its annual iPhone event on September 9, where it is expected to unveil its first foldable phone. “Tim Cook left home in phenomenal order,” said Dan Ives, partner and senior manager. director of the investment firm Yorkville Ives & Co. “But now it is about Ternus defining the AI chapter.” Ives hopes the new CEO will lean on what he knows. “There’s no reason to fix what’s already working,” he said, predicting that Ternus will focus on hardware innovation and leave Cook’s supply chain intact. The Apple logo is illuminated in a store in Munich, Germany, April 2, 2026. [Matthias Schrader/AP]Some analysts had argued that software chief Craig Federighi was the most logical choice for a company struggling to catch up with AI. Carolina Milanesi, an analyst at Creative Strategies, said this misunderstands how consumers actually adopt technology. “Consumers are still buying hardware first, and it’s going to be that way for a long time,” he said. “You’re not going to discover the value of AI if you’re not interested in the hardware.” Cook echoed that sentiment in a final memo to employees on Monday. “Few people understand what it takes to build world-changing products like John does,” Cook wrote. Ternus earned a bachelor’s degree in mechanical engineering from the University of Pennsylvania and worked as an engineer at Virtual Research Systems before joining Apple. Within the company, he is credited with driving the manufacturing of more durable, reliable and resilient products, and carrying out design work that reduces its carbon footprint. The more difficult question is what kind of leader he becomes. “Even people who know him now don’t know. You may know him as an engineering director, but once you’re a CEO, things change. Your responsibility is greater, your power is greater. You’re dancing a different kind of dance.” Apple CEO Tim Cook speaks to guests and officials during a groundbreaking ceremony for Apple’s Advanced Manufacturing Center in Houston, Texas, U.S., on August 13, 2026. [Annie Mulligan/AP]Nowhere is that gap wider than in the geopolitical role in which Cook excelled, courting both Beijing and Donald Trump’s White House to protect a supply chain that runs largely through China. Apple’s manufacturing operation is among the most complex in corporate history, a network of hundreds of suppliers and assembly lines that Cook painstakingly built over decades. To complicate matters, Trump has repeatedly demanded that Apple manufacture iPhones on American soil, threatening to impose tariffs on those made abroad. Cook avoided the harshest blows of Trump’s trade war by cultivating the president directly, taking on investment commitments and political donations from the United States, all while keeping Beijing on his side. The complicated political terrain will be new for Ternus. “He knows Apple Park like the back of his pocket in terms of hardware,” Ives said of Ternus. “But on the global stage, that’s probably one of the most important areas you’re going to have to learn on the job.” Cook won’t go far. He becomes executive chairman of Apple’s board of directors on the same day, with a mandate that the company says includes engaging policymakers around the world. “That was really smart,” Milanesi said, arguing that the deal frees Ternus from a role Cook has played alone for years. The iPhone event on September 9 will be the first public measure of delivery. A foldable iPhone would be the most significant redesign in years, and Ternus will be its face: eight days after work begins. “This is a moment they created for him,” Milanesi said.