Xamarin.iOS 11.6.99 Release Notes

Getting Started | What's New | Known Issues | Blogs | Feedback | Open Source

This version of Xamarin.iOS corresponds to our xcode9.3 (xcode9.3) milestone. This is presently based on our stable d15-5 milestone, i.e. Xamarin.iOS 11.6.x.


  • The latest features and API requires Xcode 9.3 beta 2 and the bundled iOS, tvOS and watchOS SDKs;
  • Apple Xcode 9.3 requires a Mac running OSX 10.13.2 (High Sierra) or newer;

What's New in this Release

Support for Xcode 9.3

The SDK tooling has been updated to

  • Support the new OS from simulators: iOS 11.3, tvOS 11.3 and watchOS 4.3;
  • Support launching to devices;

Additional API

There were very few changes in the SDK. Beta 2 introduced BusinessChat for iOS (and macOS) and this will be included in a future preview.

Release History

  • February 15, 2018 - Xamarin.iOS

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

February 15, 2018 - Xamarin.iOS

This version is available as a web preview. It will work correctly with the current stable Visual Studio for Mac (7.3) and Visual Studio 2017 (15.5) on Windows.

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 require 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.


Your feedback is important to us. If there are any problems with this release, check the Xamarin.iOS Forums and Xamarin Mac/iOS Github Repository 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:

Continuous Builds

All of our builds are also available for download on Jenkins. Note: these builds come from our build bots and receive no QA testing. Verified builds are periodically made available.

Our Jenkins bots produce the API diff for every commit that is being built.

You can track the latest status of our API work from our wiki.