We all live in our own bubbles. I never saw a tech person using MacOS, it's always Windows or Linux - I assume that's not your experience either (and I only know a few people using MacOS privately). That probably mostly depends on the country one resides in.
59nadir|1 year ago
Statistically speaking there was no "most developers use this", but the closest OS offering was Windows at 45%.
Given Apple's poor performance on the OS side the past few years I'm not sure the hardware has managed to keep users on their side anyway; they even lost DHH very publicly not that long ago... So the numbers might be even worse now.
Edit:
In the latest StackOverflow survey 31.8% of developers report using MacOS (for personal and professional use), 57.9%/47.6% for Windows (personal/professional use). So both MacOS and Windows are eating into Linux's share at the moment, with Windows offering them to instead run Linux inside of Windows.