On November 4th, the macOS virtual environment for GitHub Actions will update to Catalina (v10.15), the latest version of macOS X. After the update, jobs using the macos-10.14 virtual environment will not run. Any jobs in your workflows that run on the macos-10.14 virtual environment must migrate to macos-latest.

We’re also making a few changes to the minimum supported versions of Xamarin and Xcode. Changes include:

  • Removed Xamarin.iOS SDK 12.*
  • Removed Xamarin.iOS SDK 11.*
  • Removed Xamarin.iOS SDK 10.*
  • Removed Xamarin.Android SDK 9.*
  • Removed Xamarin.Android SDK 8.*
  • Removed Xamarin.Android SDK 7.*
  • Removed Xamarin.Mac SDK – 5.*
  • Removed Xamarin.Mac SDK – 4.*
  • Removed Xamarin.Mac SDK – 3.*
  • Removed Xcode 10.*
  • Removed Xcode 9.*

To learn more about the different virtual environments and included software, please read Virtual Environments for GitHub Actions. Please contact GitHub Support if you run into any problems or need help.