Xamarin.iOS 11.2

version:11.2 releasedate:2017-09-25


  • Xcode 9.0 and the bundled iOS, tvOS and watchOS SDKs, Using an older Xcode version is possible but some features are not available, in particular:

    • The static registrar requires Xcode 9 headers files to build applications, leading to MT0091 or MT4109 errors;
    • Bitcode builds (for tvOS and watchOS) can fail submission to the App Store unless Xcode9 toolchain is used;
  • Apple Xcode 9.0 requires a Mac running macOS 10.12 (Sierra) or newer;

What's New

This release is built upon our open sourced SDK, using the d15-4-xi branch and is based on Mono 5.2 (2017-04).

This is the Xcode9 enabled version of the previous XI 10.14 beta releases.

Xamarin.iOS 11.2.1

This version was shipped along the service release 2 (SR2) of Visual Studio 2017 (15.4.2) but, beside a new version number, is identical to the previous version.

Xamarin.iOS 11.2.0

Miscellaneous Enhancements


  • [msbuild] Strip frameworks better. This can save a significant amount of space when using code-sharing: the PIX app saved ~11mb in release mode (when stripping)

Bug Fixes

  • 58411 - [bcl] TrustFailure (CertificateUnknown) when using user-installed root certificates
  • 56345 - [msbuild] Properly generate dSYMs for WatchKit2 appex's
  • 56452 - [jit] Optimize ldloc+ldfld operations for valuetypes, so they don't require making a copy of the valuetype
  • 57266 - [mtouch] Normalize strings that refer to assemblies and their paths before comparing them
  • 57764 - [msbuild] Don't define IOS for tvOS binding projects
  • 57826 - [mtouch] Fix same symbol used in assemblies with/without dlsym
  • 57833 - [mtouch] Check for __Internal p/invokes after processing for exception marshaling
  • 57919 - [bcl] Dynamic object is not supported
  • 58114 - [llvm] csc (Rolsyn) produce fault clauses that the llvm backend does not support

  • 57919 - [bcl] IsComObject() throws PlatformNotSupportedException and breaks uses of dynamic / SLE []

  • 58063 - [linker] Fix reading assemblies with incorrect forwarders []
  • 58264 - [llvm] Assertion: should not be reached at mono/mono/mini/unwind.c:623 []
  • 58446 - [llvm] Fix the calling of fault clauses in llvm compiled code []
  • 58834 - [cecil] Fix MT2102 due to incorrect cecil throws ANE for some debugging symbols []
  • 58367 - [runtime] Parameters passed on the stack use at least 8 bytes on x86-64 []
  • 58778 - [mtouch] Put 'monoprofilerstartup_log' in the symbol list (so it is not stripped) []

API diff

The following documents contains a complete list of the API changes since the 11.0 release:

Xamarin Workbook

If it's not already installed, install the Xamarin Workbooks app first. The workbook file should download automatically, but if it doesn't, just click to start the workbook download manually.