[sfRattan]

MacOS isn't as locked down as iOS or Apple TV (yet) unless you publish via the Mac App Store, but a secondary factor is that Apple customers expect to pay to solve a problem without having to think about it.

The good is that the above norm encourages the creation of high quality software. The bad is that, by the same token, some ideas that would be free/libre community projects on other platforms are instead paid utilities in Apple's walled garden, especially on iOS and Apple TV.