You have Xamarin in Microsoft Visual Studio in Windows platform, and have connected your Mac using the Mac pairing tool in Microsoft Visual Studio. When you hit compile, you get the following error message…

The version of Xamarin.iOS requires the iOS XX.X SDK (shipped with Xcode X.X). Either upgrade Xcode to get the required header file or set the managed linker behaviour to Link Framework SDKs Only (to try to avoid the new APIs)

This error simply means that your Xcode (in your Mac) is of the older version and the Xamarin is newer. The quickest way is to set the managed linker behaviour to “Link Framework SDKs Only”. This vilod shows you how to do it….. Alternatively, you can upgrade your Xcode in your Mac.

I hope this helps.