On Monday, Apple announced that Tim Cook will step down as chief executive officer, a role he has held since 2011, succeeding co-founder Steve Jobs. He will be replaced by John Ternus, senior vice president of Hardware Engineering, who is set to take over on Sept. 1, 2026.
Despite spending nearly his entire career at Apple, Ternus remains relatively unknown outside the company. A mechanical engineering graduate of the University of Pennsylvania, he joined Apple in the late 1990s after a brief stint at a virtual reality startup. He later rose through Apple’s hardware engineering division, most recently overseeing...