Visual Studio for Mac is no longer in beta…
We are currently using it for Rhino for Mac development and - if you are a RhinoCommon developer targeting Rhino for Mac - we suggest you move from Xamarin Studio to Visual Studio for Mac too.
We have updated the RhinoCommon AddIn - they are called “Extensions” now - so you can debug your plugins in Rhino from Visual Studio.
We’ve also updated the Installing Tools (Mac) guide. If you are familiar with Xamarin Studio, you should feel right at home.