Cook steps down as Turners is appointed the new CEO. /Courtesy of Reuters Yonhap News·Reuters News1

Apple has closed the book on Chief Executive Officer Tim Cook's 15-year tenure and pulled out the "engineer CEO" card. Even with record results, reviews have said the pace of its shift to Generative AI has fallen short of expectations, so Apple chose John Ternus, who led iPhone and Mac development, as the next CEO instead of Cook, who has been strong in supply chain management and defending profitability. The move is seen as a signal that the next battleground will be hardware and user experience.

◇ Apple ends Tim Cook's 15-year era… generational shift aimed at the next era

On the 20th (local time), Apple said Cook will step down as CEO effective Sept. 1, and that Ternus, senior vice president of hardware engineering, will become the new CEO. Cook will not leave the company entirely but will move to executive chair of the board. Apple said the appointment was the result of a long-term succession plan unanimously approved by the board.

On the surface it is a "departure," but its nature is far from a dismissal or an emergency response. Since succeeding the late Apple co-founder Steve Jobs in 2011, Cook has grown the company's value nearly twentyfold. Apple posted a record $416.2 billion in sales last year (about 612 trillion won) and still maintains formidable cash generation. Judging by results alone, this is not the picture of a company that must rush to change its leader. The industry views the move not as a card to steady a wavering company, but as a preemptive generational change aimed at the next era.

◇ Apple's core axis shifts from the supply chain to AI

Ultimately, AI is the backdrop for Apple's decision to change CEOs now. Apple jumped into the Generative AI race last year with "Apple Intelligence," but it did not fully meet market expectations. In particular, because the launch of a more personalized Siri and cross-app task execution has been pushed to 2026, Apple invited criticism that its AI transition is slower than hoped. Apple has long convinced the market with a strategy of releasing "highly finished products, even if late," but in the Generative AI phase, that time lag itself has begun to be seen as a weakness.

At this moment, the fact that the successor is Ternus is symbolic. Ternus joined Apple in 2001 and began his career on the product design team, later leading hardware development for major products including the iPhone, iPad, Mac, Apple Watch, and AirPods. More recently, he has overseen Apple's hardware engineering broadly, responsible for the design and polish of new products. If Tim Cook was an operator strong in supply chains, operations, and profitability management, Ternus is seen as a figure with a much stronger product and engineering profile.

By putting him out front, Apple is essentially saying it will again seek growth drivers in products. Competition in the AI era does not end with releasing a bigger model first. What determines real consumer experience is how naturally chips, devices, operating systems, and services mesh. An industry source said, "Rather than taking on a direct model-vs.-model fight like OpenAI or Google, Apple appears to have reaffirmed through this appointment that it will differentiate with a complete, integrated experience across its own hardware and software."

◇ "We must make AI in the Apple way" tasks for the Ternus era

The real work begins now. Under Cook, Apple's strengths were efficiency and profitability. Under Ternus, Apple will be hard-pressed to be judged by efficiency and profitability alone. The market is asking not whether Apple is a company that "equips AI," but whether it is a company that "makes AI work" in an Apple-like way. It means restoring trust shaken by the Siri delays and rebuilding a new product narrative after the iPhone.

With the smartphone market in a mature phase, Apple must find new growth engines through Vision Pro, wearables, services, and next-generation devices. Ternus now faces the task of going beyond being an engineer who builds great hardware to showing how new product lines in the AI era will translate into user experiences and revenue models.

Kim Yong-seok, a distinguished professor at Gachon University, said, "If Jobs opened Apple's era with products, and Cook expanded Apple's empire with operations, Ternus must prove once again in the AI era that Apple is a company that 'speaks through products,'" adding, "While repeating the iPhone's success is difficult, the market at least expects Apple to set a direction for what it will make the core platform of the next 10 years."

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