On September 1, a new era begins at Apple as John Ternus becomes just the third man to hold the CEO role at the tech giant since 1997.

Ternus was announced as Tim Cook's successor back in April, bringing Cook's 15 years at the helm of one of the world's biggest companies to an end. Since then, Ternus, a leading hardware engineer at the company, has been working closely alongside Cook in preparation for the big job.

Just as Cook had when he took over from the iconic Steve Jobs, Ternus has big shoes to fill. Apple's share price has increased by more than 2,000% since Cook took over in 2011 and the company has sold more than 3.1 billion iPhones in that time.

Ternus faces a range of challenges at Apple, but his ability to keep the company at the top will hinge on how he reshapes its AI strategy.

Apple has struggled to successfully embrace the technology so far, with critics saying it has fallen far behind its rivals.