That's really what it's all about though. Many developers prefer a unix environment. Windows is often neglected in open source, so getting up and running with a working dev environment can be a challenge. So, for many, Windows just isn't really an option.

That leaves macOS as the only option that's a first class citizen in all regards -- hardware support from manufacturer, support in open source projects, support for proprietary applications (I.e MS Office), etc.

For non-programmers though, there really isn't a meaningful difference. Take your pick.