Many are baffled that OS X is so popular among developers. . . I think many commenters in this thread could benefit from taking a step back and remembering just how unimportant this arguing is.
If you're someone who has taken an interest in making Linux a popular choice as a desktop OS, this subject is critically important. It's only natural to assume that one could learn a lot about what it takes to make a Unix-based operating system popular among desktop users by observing the example of the only Unix-based operating system to have become popular on the desktop market. Figuring out how it is that OS X is able to attract developers despite its (presumably) inferior developer experience is a closely related question.
If you're someone who has taken an interest in making Linux a popular choice as a desktop OS, this subject is critically important. It's only natural to assume that one could learn a lot about what it takes to make a Unix-based operating system popular among desktop users by observing the example of the only Unix-based operating system to have become popular on the desktop market. Figuring out how it is that OS X is able to attract developers despite its (presumably) inferior developer experience is a closely related question.