"Cross-platform" is not a promise that it will work on every platform, and saying that to be cross-platform without that including MacOS is "hostile towards Mac

"Cross-platform" is not a promise that it will work on every platform, and saying that to be cross-platform without that including MacOS is "hostile towards MacOS users" is unreasonable. The most you can reasonably hope for, in something you can get for free, is that if it says it works on a given platform, then it is reasonably functional there.