How can Start the IOS Emulator ?

The iOS or Mac development using Xamarin requires you to have a Mac laptop or device present closer, and connected to your current machine over the network. 

 

Xamarin would then transfer the application over to Mac, compile and generate the response for you on that Apple environment. The problem is that the architecture for Apple products is different, that is why most of the programs are not going to run the same way your Android, Windows Phone or other Linux-based (or similar architecture) devices may work.

 

That is why, Mac is required to develop and test applications for Apple products; including iOS.