I updated to latest version of Xamarin Studio this morning and now my solution which targets SDK 8.1 is unable to debug on a physical device. I get the following set of build errors, which absolutely do not apply to my > application:
Error MT4134: Your application is using the 'Contacts' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'GameplayKit' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'MetalKit' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'ModelIO' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'MetalPerformanceShaders' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'CoreSpotlight' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'ContactsUI' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'ReplayKit' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)
Error MT4134: Your application is using the 'WatchConnectivity' framework, which isn't included in the iOS SDK you're using to build your app (this framework was introduced in iOS 9.0, while you're building with the iOS 8.4 SDK.) This configuration is only supported with the legacy registrar (pass --registrar:legacy as an additional mtouch argument in your project's iOS Build option to select). Alternatively select a newer SDK in your app's iOS Build options. (MT4134)