Tim Cook, a supply chain genius, is passing the baton at Apple to hardware engineer John Ternus, who led the development of chips that replaced Intel processors in Mac computers. As the head of hardware engineering at Apple, Ternus also spearheaded the development of Apple Watch, AirPods, and Vision Pro headsets.

Ternus, currently Apple’s senior VP of hardware engineering, will take over the CEO job on Sept. 1, while Cook assumes the role of executive chairman, replacing longtime chair Art Levinson. Cook is known to have been working on his succession for nearly a year.

What does this CEO transition signal? For a start, while Cook has been widely acknowledged as a smooth operator, taking Apple from a $350 billion company in 2011 to nearly a $4 trillion market cap in 2026, he wasn’t a product CEO. Cook squeezed so much profit from the device business that Apple became the world’s most valuable company, but critics feel that Apple lost its innovation streak during his 15-year tenure.

Ternus, an affable engineer who rose through the ranks of Apple’s hardware division, has spent his 25-year tenure building the company’s most consequential products: from iPhone to iPad to AirPods. So, his ascent to the leadership role marks a shift back to product-led innovation at Apple.

Next, and equally crucial, is the fact that Apple is probably the only tech behemoth perceived as having missed the AI boat over the past decade. It’s important to note that Apple was the first smartphone maker to capture public imagination by incorporating Siri virtual assistant into the iPhone back in 2011.

Fast forward to 2026, industry reports suggest that Apple has turned to Google to launch an updated Siri powered by the Gemini model. One of the first challenges awaiting Ternus will be executing a promised revamp of the Siri virtual assistant and thus making Apple relevant in the AI world again. It’d be interesting to watch how he integrates AI into the iPhone, the most successful consumer product in history.

Ternus and the silicon frontier Another factor prominent in this transition is Apple’s in-house silicon development. One of Ternus’ major accomplishments has been working with Apple’s in-house silicon team to replace Intel processors in Mac computers with Apple-designed chips. The chips proved more energy efficient, and as a result, Mac sales soared after this processor change.

Case in point: Johny Srouji, who currently oversees Apple’s custom chip and sensor designs, has been named chief hardware officer. Srouji, who worked at Intel from 1990 to 2005, joined Apple in 2008 to lead the development of the A4 chip, Apple’s first system-on-chip (SoC) device. Eventually, he helped Apple build one of the world’s most innovative teams of silicon engineers.

Apple’s in-house silicon also enabled the company to build a MacBook Air with a thinner profile, 18 hours of battery life, and performance comparable to a MacBook Pro. Here, Ternus was a major influence in bringing critical technologies in-house for such design undertakings.

He also played a key role in switching over to the M1 chip in iPad Pro. He made the case that the M1 chip used in the iPad Pro offers the same performance as the Mac counterparts. In M1, the 8-core CPU design featured faster performance in low-power silicon, while the 8-core GPU delivered faster graphics.

Cook, the opposite of Steve Jobs’ charismatic, feisty leadership style, brought calm execution and operational discipline while building one of the most efficient technology ecosystems in corporate history. On the other hand, Ternus is well-known inside Apple for his engineering competence. Cook praised him for having the mind of an engineer, the soul of an innovator, and the heart to lead with integrity and honor.

While Cook was an operations guru, Ternus’ tenure is likely to bring a renewed focus on engineering-centric product innovation to launch new devices such as folding phones, smart glasses, VR devices, and AI pins. Meanwhile, Apple will have to get its AI act together.

By: DocMemory
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