They don't make any money on macOS anymore. You get it preinstalled on their computers, you can't buy it separately, you can't install it on other computers, and major upgrades are free.

The money they make from MacOS is a footnote compared to the money they make from phone hardware, the app store transaction tax, and ads. To a first approximation, the only reason that Apple cares about MacOS is so that people can make iOS apps.