The challenges John Ternus inherits as he replaces Tim Cook on Sept. 1 amid rising component costs, staff retention issues, efforts to catch up in AI, and more (Mark Gurman/Bloomberg)

Mark Gurman / Bloomberg: The challenges John Ternus inherits as he replaces Tim Cook on Sept. 1 amid rising component costs, staff retention issues, efforts to catch up in AI, and more — Apple's changing of the guard will be gradual, with outgoing CEO Tim Cook handling Trump, China.