Apple's new CEO, John Ternus, takes over from Tim Cook after 15 years John Ternus takes over as Apple's CEO on Tuesday, ending Tim Cook's 15-year tenure during which the company's value reached $4.6 trillion. Ternus faces the challenge of catching up in artificial intelligence after Apple's stumbles, as well as navigating supply chain issues and relationships with President Donald Trump. Apple's new CEO John Ternus https://apnews.com/article/apple-iphone-succession-jobs-cook-ternus-374bd6399b3fbd14695286055228cd58 takes the helm of the iconic tech giant on Tuesday, ending Tim Cook's 15-year tenure https://apnews.com/article/apple-tim-cook-ceo-chage-john-tenus-3e179f3ba156f37ebdc4da5c137a8263 during which the company's value skyrocket to $4.6 trillion thanks to the iPhone's enormous popularity. The transition to a new CEO comes at a pivotal time for Apple. Artificial intelligence has unleashed the greatest upheaval within the industry since Steve Jobs https://apnews.com/hub/steve-jobs unveiled the first iPhone in 2007. Apple has gotten off to a rough start in AI after stumbling in its efforts https://apnews.com/article/apple-conference-iphone-artificial-intelligence-ba918c2091e0d49a8b3f164e4f980b6e to deliver new features built on the technology, as promised nearly two years ago https://apnews.com/article/apple-artificial-intelligence-siri-iphone-software-conference-4217d67977f95ead880835a71ecce098 . Earlier this year, it unveiled new artificial intelligence advances https://apnews.com/article/apple-siri-wwdc-iphone-aa25d07c06d366ec5b62643a1f5b0db9 , including upgrades to its Siri assistant, emphasizing a focus on privacy and day-to-day use as the iPhone maker tries to catch up with rivals. Ternus faces challenges that will force him to step outside his comfort zone in hardware engineering. Beyond finding ways to keep Apple competitive in the artificial intelligence https://apnews.com/hub/artificial-intelligence race, he will need to navigate supply chain questions and relationships with figures such as President Donald Trump https://apnews.com/hub/donald-trump , who offered public praise for his predecessor on Tuesday. Serving as Apple CEO will also require soft skills, including developing relationships with important figures. Cook cultivated ties https://apnews.com/article/trump-apple-tim-cook-tech-0a9fb8e6df321f6553c23b5138ff1f06 with Trump as he navigated the company through business challenges, including Trump's trade and tariff war targeting countries in Asia, where Apple has extensive manufacturing supply chains. Although he is handing over the CEO reins at Apple, Cook is widely expected to help the company maintain a good relationship with Trump after he shifts to his new role as executive chairman. Ternus worked on some of Apple's signature products under Cook, including the Apple Watch, AirPods and Apple Vision Pro. He will headline next week's launch of the latest iPhone at Apple's Cupertino, California, headquarters. The Associated Press