The mono team is working on a new JIT, that is easy to port to different platforms.
Desktops supported Mono currently has support for: The Gnome desktop enviroment The KDE desktop enviroment The Windows desktop enviroment (in progress) There is on-going work to support Aqua on MacOS X. The Mono Handbook | Mono Homepage | Credits | License
There is on-going work to support Aqua on MacOS X.