Back when MS broadcasted OSX/nix compatibility for Visual Studio I felt it necessary to comment that .NET development has been supported in OSX/nix for over a decade.
In short, Miguel De Icaza should be awarded a medal from MS for his heroic effort in developing the Mono platform and tooling; in spite of the constant threat of legal action from Microsoft for 'patent infringement' of their supposedly 'open' (ie ECMA) standard languages and VM.
Hopefully, he finally receives public recognition and reward for all his hard work.