Apple Inc.’s Tim Cook confirmed Wednesday that the latest iPhones, his flagship product, are not selling up to expectations. The news exposes his toughest challenge since taking over as chief executive officer from the legendary Steve Jobs: how to take the company forward when it’s top product has lost luster with consumers.
Cook has dealt with a series of controversies during his more than seven years in the role, ranging from the company’s failed Google Maps replacement launch and the need to oust the head of iPhone software in 2012, to concerns over labor and tax practices. He has calmly