Tim Cook Passes $4.6 Trillion Baby to John Ternus Today

Tim Cook is officially stepping down as Apple CEO today. John Ternus, who has spent 25 years at the company—23 of them before most people knew what an AirPod was—takes the wheel of a $4.6 trillion machine that Cook spent 15 years building into something that makes Steve Jobs' original dream look quaint.

Cook's departure is the kind of transition that feels both inevitable and terrifying. He took over a company that was already iconic and made it the most valuable technology company on earth. That is, genuinely, one of the harder things to do. Inheriting genius is easier than maintaining it. Ternus is about to find out.

The vice president of Hardware Engineering since 2013, Ternus has fingerprints all over Apple's most important products. iPad. AirPods. Apple Watch. He knows how to make things that make people want to throw money at Apple. What he doesn't know yet is whether that works when the entire industry is panicking about artificial intelligence and he's stuck explaining why Apple's AI features still don't exist after two years of promises.

Cook, in a statement that sounds exactly like someone who just handed off an impossible job, called Ternus "a visionary whose contributions to Apple over 25 years are already too numerous to count, and he is without question the right person to lead Apple into the future." Translation: I've thought about this a lot.

The timing is remarkable, though possibly not coincidental. Artificial intelligence has been the greatest upheaval in tech since the iPhone itself. Apple got off to a rough start—the kind where you promise features and then, awkwardly, don't deliver them. Ternus inherits that particular headache along with a supply chain that requires a geopolitical degree and a new administration that apparently requires a personal relationship.

Cook isn't disappearing. He's becoming executive chairman, which means he'll spend his time managing relationships with President Trump and the Chinese government. In other words, he's keeping all the actually impossible parts.

Ternus gets the hardware. The innovation. The expectation that whatever he does next will somehow be as transformative as everything before it. He's spent his entire career inside Apple's carefully controlled ecosystem of excellence. He's never had to manage expectations this massive from the outside. He's never had to convince Wall Street that the company still has magic left.

That starts today.