Can Apple’s new CEO restart the Steve Jobs innovation engine?

When John Ternus becomes Apple’s chief executive on Tuesday, he inherits a company that looks, on paper, unbeatable. Apple is valued at nearly $5 trillion and remains one of the most profitable businesses on Earth. That is also the problem. Starting at the summit is harder than climbing it. As The Wall Street Journal’s Rolfe Winkler has put it, Ternus must take Apple beyond Tim Cook’s iterative supply-chain mastery if the company is going to reach new heights from already extr