How do tech conferences and meetup groups work without a sea of macs?

But, it might be better to say HN is a tech bubble, because everywhere in the world that I've been people who work on web tech use macs, for most of us the job would be almost impossible without a *nix OS.

And this post was written (somewhat regretfully) from a Mac in Aotearoa/New Zealand, where non mac laptops are somewhat rare in the tech community (and are then usually Linux rather than Windows).