The Globe and Mail reports in its Wednesday edition that John Ternus became Apple's chief executive officer on Tuesday, succeeding Tim Cook, the company's leader for the past 15 years. A New York Times dispatch to The Globe says Mr. Ternus will have to guide Apple through an unusual amount of leadership churn. He will have to stem an exodus of talent to companies like OpenAI. And he will have to distinguish himself from Mr. Cook, who will remain at Apple as its executive chair. Most of all, Mr. Ternus will have to perform a balancing act: displaying the financial predictability and discipline that have been a hallmark of the Cook era while showing that Apple can still create new products that capture the imagination of consumers. At its annual hardware event this month, Apple is expected to introduce a foldable iPhone -- its most significant change in 19 years to its most important product. "Apple is going to have to face this idea of ‘What's next?'" said Michael Gartenberg, a consumer technology analyst who worked as a product marketer at Apple from 2013 to 2016. The task for Mr. Ternus is to "bring Apple back to being a cool brand even though it's a multitrillion-dollar company, show that you are able to innovate."