The list of potential contenders to succeed Tim Cook as the next CEO of Apple includes at least four top executives at the tech giant – though the exact timing of his exit remains unclear.John Ternus, the 50-year-old head of Apple’s hardware division, is considered the frontrunner, according to The Wall Street Journal and Bloomberg. He is responsible for overseeing the flagship iPhone – which still rakes in the bulk of Apple’s revenue – as well as other devices like Mac computers and AirPods.Another top con ...