grify It is unreasonable to suggest that the only way to proceed is by taking the impractical and expensive option of getting a windows computer specifically for game development even though Apple macs are usually industry standard for creative software and many design applications don't even support Windows.
He didn't, he just acknowledged the option for completeness. It's just one of many in the list.
In this specific case I think your best course of action is to seek advice from the core developers, preferably specifically one who is in charge of and/or dedicated to building and maintaining the Mac OS X platform support. The contributors chat is likely your best bet for that.