Tim Cook Steps Down as Apple CEO After 15 Years, John Ternus Takes Over

One of the most successful eras in global tech business history has come to an end: August 31, 2026, marked Tim Cook’s final day as chief executive officer of Apple. Effective September 1, leadership of the corporation officially passes to John Ternus, a company veteran and former head of hardware engineering. Cook himself remains with the company as executive chairman of the board of directors.

Cook’s Farewell Letter: “Culture Triumphs Over Everything”

On his final day as CEO, Tim Cook sent a corporate message to employees.

Sending lots of love to the Apple community on my last day as CEO. My title changes tomorrow, but the love I have for the Apple community never will. Thank you for being a constant source of inspiration. My gratitude is endless, and I’m excited for the next chapter!

— Tim Cook (@tim_cook) August 31, 2026

As reported by The Verge, which published the full text of the letter, the executive emphasized that the company’s true legacy is measured not by financial reports, but by internal values:

• Cultural code: the phrase “culture triumphs over everything” (culture triumphs over everything) served as the central theme of the address;
• Trust in his successor: Cook expressed complete confidence in John Ternus, noting that few people in the world have such a deep understanding of creating devices that change people’s everyday lives;
• Gratitude to the team: the former CEO stressed that every Apple triumph over the past 15 years was the result of the collective work of hundreds of thousands of engineers and designers.

The leadership transition was not spontaneous: as stated in Apple’s official announcement, the board of directors unanimously approved Ternus back in April, providing a four-month transition period for a smooth handoff of responsibilities.

15 Years of Triumph: $3.6 Trillion Growth and the Transition to Apple Silicon

Tim Cook took charge of Apple on August 24, 2011, on the personal recommendation of Steve Jobs shortly before his passing.

Over a decade and a half under his leadership, the corporation achieved phenomenal results:

• the company’s market capitalization grew by $3.6 trillion, making Apple the most valuable public business on the planet;
• the product lineup expanded with categories such as Apple Watch, AirPods, HomePod, and the Vision Pro spatial computing headset;
• a multi-billion-dollar services ecosystem was built (Apple Music, Apple TV+, iCloud, Apple Pay);
• the historic transition away from Intel processors was completed alongside the triumphant move of Mac computers to custom Apple Silicon architecture chips.

The Cook era also faced serious challenges: the cancellation of the long-running autonomous electric car initiative, Project Titan; niche sales of the costly Vision Pro headset; and the need to accelerate competition in generative artificial intelligence amid breakthroughs from OpenAI and Google.

Who Is John Ternus, and the Hardware Division Shakeup

The new CEO is a quintessential representative of Apple’s internal engineering talent. Ternus joined the company in 2001 after earning a degree in mechanical engineering from the University of Pennsylvania.

According to Reuters, in recent years Ternus oversaw development of every iPad generation, all AirPods models, the Mac transition to M-series chips, as well as the carbon footprint reduction initiative and improved device repairability.

In connection with Ternus’s promotion, key engineering departments were consolidated: Johny Srouji, architect of Apple Silicon’s A- and M-series chips, assumed the role of Chief Hardware Officer.

Cook’s Role and the New CEO’s Trial by Fire

Tim Cook is not retiring: as executive chairman of the board, he will continue to oversee strategic development, supply chains, and key diplomatic relations with world governments.

The first public trial for John Ternus in his new role will take place on September 9 at the “Surprise and shine” event, where the company will unveil the flagship iPhone 18 lineup, an updated Apple Intelligence platform, and, according to numerous leaks, the company’s first-ever foldable iPhone.