We are excited to announce that Xcode 9 is now available for use on the CircleCI macOS platform.
The latest Xcode release, announced just yesterday, adds multiple improvements to the build system, which in turn brings great benefits to all customers using Xcode 9 in their CircleCI projects. The changes include improved simulator stability, significant reduction in the amount of Exit Code 65 failures, and shorter app build times.
To start using Xcode 9 in your macOS builds on CircleCI you can add the following to your circle.yml:
machine: xcode: version: "9.0"