Development has resumed on the native OSX driver for Winforms.  This effort
is in the early stages, however if you wish to try it out, you can either:

- Macpack with winforms-native
or
- export GDIPLUS_NOX=1
- export MONO_MWF_USE_QUARTZ_BACKEND=1
- and then run your app from the terminal

This driver is an unsupported preview for developers, contributions are
welcome.