Simple question here. Xamarin.Forms obviously has an iOS component. However, I do not see anything for OSX. Are these the same things? Or does Xamarin.Forms need to be extended at some point to support OSX?
I do not own a Mac (yet), so I am completely ignorant on this topic. I obviously plan on buying one once I start gearing towards iOS development. Soon, I hope. 
Thank you for any assistance/insight!