At the end of January 2022, Bitrise will stop supporting Xamarin and remove all VS4 Mac stacks, deprecating Xamarin Steps and Visual Studio for Mac stacks in October 2021. This decision was made to focus efforts on other technologies with similar infrastructure requirements, allowing for better support for developers and users. The transition may cause issues for those currently using Xamarin on Bitrise, but the company will do its best to make it as smooth as possible. Developers who use Visual Studio for Mac stacks are advised to migrate their Workflows to macOS stacks if they're not using Xamarin.