Longtime Apple executive and engineer John Ternus is stepping up to lead the company as his predecessor assumes an advisory role.

John Ternus takes over as Apple CEO on September 1, succeeding Tim Cook. He's already restructuring Apple's design team and shifting management

John Ternus takes over as Apple's chief executive on Tuesday, inheriting a company that towers over the smartphone market but trails its rivals in artificial intelligence.

Cook will move into the role of executive chairman, while Ternus will join Apple’s board the same day. Cook has played a central role in expanding the company’s business and…