Apple has completed a historic leadership transition, with John Ternus officially replacing Tim Cook as CEO after Cook’s 15-year tenure leading the world’s most valuable technology company. The handover marks the end of one of the most successful executive runs in American business history and begins a new chapter with significant implications for New York’s technology and media sectors.

Under Cook’s leadership, Apple’s market value surged to approximately $4.6 trillion, driven by the iPhone’s continued dominance and the growth of services revenue. Cook will remain involved as executive chairman of the board, where he is expected to help the company navigate its relationship with the Trump administration amid ongoing trade disputes affecting Asian supply chains, AP News reports.

Ternus, previously Apple’s senior vice president of hardware engineering, oversaw the development of products including the Apple Watch, AirPods, and Apple Vision Pro. He faces immediate challenges that will test his leadership beyond hardware engineering. Artificial intelligence has triggered the most significant disruption in the technology industry since the original iPhone launched in 2007, and Apple has struggled to keep pace with specialized AI companies in this race.

For New York, the Apple transition has particular resonance. The company’s growing presence in the city — including its corporate offices in Hudson Yards and significant investments in content and media — ties the region to Apple’s strategic direction. Apple’s services business, which includes Apple Music, Apple TV+, and Apple News, has become a critical revenue driver, and these operations have substantial footprints in the New York media ecosystem. Changes in product strategy under Ternus could affect everything from advertising partnerships to content distribution deals.

The transition also comes at a delicate moment for Apple’s regulatory outlook in New York. State Attorney General Letitia James has been active in antitrust enforcement against technology companies, and Apple’s App Store practices have faced scrutiny from both state and federal regulators. A new CEO may alter the company’s approach to these regulatory challenges, potentially reshaping relationships with New York-based developers, publishers, and advertisers who depend on Apple’s platforms.

Ternus will face his first major product launch next week, when Apple unveils its latest iPhone at the company’s Cupertino headquarters. The launch will be closely watched not just for the device itself, but for signals about Apple’s AI strategy and whether the company can close the gap with competitors who have moved more aggressively in artificial intelligence. Earlier this year, Apple introduced new AI features including improvements to Siri, but the rollout has been criticized as uneven and slow, as AP News notes.

Beyond AI, Ternus must manage supply chain disruptions and tariff pressures. The Trump administration’s trade policies have affected Apple’s manufacturing base in Asia, and the company has been diversifying production to India and Vietnam. Cook’s established relationship with Trump was seen as an asset in managing these tensions; whether Ternus can replicate that diplomatic balance is uncertain.

The leadership change at Apple represents a broader generational shift in the technology industry. The founders and executives who defined the smartphone era are giving way to leaders who must navigate a more complex landscape of AI, regulation, and geopolitical competition. For New York’s technology and media sectors, which are deeply intertwined with Apple’s ecosystem, the Ternus era begins with high stakes and high expectations.