I just thought I'd give your product a try. My hopes are very high, since at $800 I expect something almost on a par with Delphi. CrossBox seems like a neat idea but it would be great to explain upfront that in order to develop for other platforms you actually need to have that machine. It's half-cross-platform, I'd say.
We're working on making the osx target be able to compile locally, but it's a slow process. A beta backend can now create osx executables from windows without running osx. There however are a lot of things that are closed tools that are osx only, like Ibtool, codesign etc, a lot of which are required parts of getting a final application. While we're working on getting around those, osx will be required to compile yes. Obviously debugging Will stay dependent on osx. (Also iOS will require osx due to how it's not possible to upload and debug apps from windows at all). That said I agree that should be made more clear.