JK Scheinberg was one of the lead engineers responsible for getting Mac OS X to run on Intel machines—one of the most significant shifts in Mac computing. But despite his achievements, his past experience wasn't good enough for him to get a job as a Genius at his local Apple Store years after he retired, reports the New York Times:
I'm lucky enough to get my tech support from JK Scheinberg, the engineer at Apple who led the effort that moved the Mac to Intel processors. A little restless after retiring in 2008, at 54, he figured he'd be a great fit for a position at an Apple store Genius Bar, despite being twice as old as anyone else at the group interview. "On the way out, all three of the interviewers singled me out and said, 'We'll be in touch,'" he said. "I never heard back."