Xamarin.iOS 11.11 Release Notes

System Requirements | What's New | Known Issues | Blogs | Open Source


  • The latest features and API requires Xcode 9.3 and the bundled iOS, tvOS and watchOS SDKs;
  • Apple Xcode 9.3 requires a Mac running OSX 10.13 (High Sierra) or newer;

What's new in this release

API Enhancements

  • 3544 - [foundation] Avoid unnecessary native calls for NSNull.Null
  • 3870 - [arkit] Add missing ARHitTestResultType.EstimatedVerticalPlane

Tooling Enhancements

  • 3525 - Build assemblies we ship deterministically, i.e. csc -deterministic
  • 3926 - [msbuild] Use a response file in MmpTaskBase
  • 3869 - [generator] Allow [WrapAttribute] usage with interface protocols

Release History

This version Xamarin.iOS correspond to our 15.8 (d15-8) milestone.

  • May 31, 2018 - Xamarin.iOS
  • May 7, 2018 - Xamarin.iOS

You can learn more about how we ship our releases in the Visual Studio 2017 Release Rhythm document.

May 31, 2018 - Xamarin.iOS

This version is included in the Visual Studio 2017 version 15.8 Preview 2 release.

Issues Fixed

  • 4030 - [scenekit] SCNPhysicsShape.Create transforms parameter is bound incorrectly
  • 4031 - [scenekit] SCNHitTestOptions SearchMode bound incorrectly
  • 4072 - [mtouch][mmp] BlockProxy attribute with invalid type will cause MT0000 build error
  • 4087 - [scenekit] Crash when setting RenderingApi on SCNRenderingOptions

May 7, 2018 - Xamarin.iOS

This version is included in the Visual Studio 2017 version 15.8 Preview 1 release.

Issues Fixed

  • 3199 - [msbuild] Skip reference assemblies passed to mmp
  • 3716 - [gameplaykit] Fix naming of GKNoise.DisplaceX
  • 3781 - [mtouch] Use full path to mono-symbolicate instead of UseShellExecute
  • 3830 - [runtime] Don't throw exceptions when checking if a token reference exists (and not finding any)
  • 3871 - [coretext] Fix GetMatchingFontDescriptors overload with sort callback
  • 3905 - [msbuild] Catch ArgumentException if IBToolTask fails to load plist output
  • 3922 - [msbuild] Fixed TargetDevice typo
  • 3933 - [mtouch] Fix parsing of --root-assembly
  • 3943 - [runtime] Don't lock while calling selectors that can up calling managed code
  • 3944 - [spritekit] Fix SKActionTimingFunction delegate signature
  • 60624 - [mtouch] Ignore objc-missing-super-calls warnings from clang when compiling registrar code

Integrated Mono Features/Fixes

Xamarin.iOS uses a customized runtime and base class libraries (BCL) from Mono.

Additional information can be found in Mono release notes.

Known Issues

Using an older Xcode version

Using an older Xcode version (than the one mentioned in the above requirements) is often possible, but some features may not be available. Also some limitations might requires workarounds, e.g.:

  • The static registrar requires Xcode headers files to build applications, leading to MT0091 or MT4109 errors if API are missing. In most cases enabling the managed linker will help (by removing the API).
  • Bitcode builds (for tvOS and watchOS) can fail submission to the App Store unless an Xcode 9.0+ toolchain is used.

API Diff

The following documents contains a complete list of the API changes since the Xamarin.iOS 11.10 stable release:


Your feedback is important to us. If there are any problems with this release, check the Xamarin.iOS Forums and Xamarin Bugzilla Tracker for existing issues. If you do not find any matching issue, please feel free to start a new discussion and report an issue.

Open Source

Xamarin.iOS is based on the following open-source repositories: