IME device/os choice is usually more around IT security than weird cultish things. I.e. my current job, we only use iOS/mac because then IT only has to worry about keeping a fleet of iOS/macs patched and secured. Instead of Windows and a million different linux distros.

I also personally think they picked osx because devs using windows probably won't care (since windows is already not great for dev), mac people are happy, and linux people are just glad they're not using windows.

(I'm personally in the "linux person relieved to not be using windows" camp).