Even before Apple consciously set out to harness this, people were self-identifying as Unix people, Microsoft people and even CP/M people. So, yes, Apple consciously leverages this. But, no, the behavior is not solely a result of their effort.
Consider all the tribes that don't even have a coherent "brand" behind them: C people and Ruby people; truck people and sports car people; dog people and cat people; PC gamers and console gamers; new york- and chicago-style pizza people; goths and hipsters and rockabillies; nerds and jocks; white-collar and blue-collar people; etc.
Consider all the tribes that don't even have a coherent "brand" behind them: C people and Ruby people; truck people and sports car people; dog people and cat people; PC gamers and console gamers; new york- and chicago-style pizza people; goths and hipsters and rockabillies; nerds and jocks; white-collar and blue-collar people; etc.