Fans of the iPhone and the iPad have long seen the late Steve Jobs, the co-founder of Apple, as a messianic figure, whose drive and vision turned computers from clunky business machines into the epitome of cool. Danny Boyle's new biopic, starring Michael Fassbender and Kate Winslet, will further burnish his remarkable reputation when it premiers next month. But one woman has a different and more traumatic view: Jobs's high school sweetheart Chrisann Brennan. She lived with Jobs and was an early Apple employee, only for the relationship to fall apart amid wild recriminations when she became pregnant with his...