Tuesday, September 1st marks a new era for Apple, with John Ternus taking over as chief executive while Tim Cook transitions to executive chairman. Ternus has several challenges ahead of him, from Apple’s advances in AI to the impact of geopolitical tensions on the company’s business. The former head of hardware engineering takes the reins ahead of the launch of Apple’s newest iPhones, which are due to be unveiled on September 9th. That event is expected to include Apple’s first foldable phone, marking a new departure for the company.Apple will be hoping for a hit with its new iPhone. Generating…