Getting Started with Xamarin.Mac
This article covers installation of Xamarin.Mac, including the requirements, pre-requisite software, and activation.
This guide walks through creating a simple, first Xamarin.Mac app, and in the process introduces the development toolchain, including Visual Studio for Mac, Xcode and Interface Builder. It also introduces Outlets and Actions, which expose UI controls to code, and finally, it illustrates how to build, run and test a Xamarin.Mac application.
Links to additional useful documentation.