GitHub's Xcode 27 Runner Image Now Uses macOS 27
GitHub's Xcode 27 runner image for macOS is now available in public preview, running on macOS 27 instead of macOS 26. This upgrade enables developers to validate Apple applications against the latest macOS version, enhancing compatibility testing for their builds. Workflow labels (`xcode-27`, `xcode-27-xlarge`) remain unchanged for targeting the image. This new capability is exclusively supported on arm64 macOS runners.
Enhancements (1) ›
- Xcode 27 Runner Image Upgraded to macOS 27
The GitHub-hosted Xcode 27 runner image has been upgraded to run on macOS 27, moving from its previous macOS 26 environment. This enhancement, available in public preview, allows developers to validate Apple applications against the latest macOS version. Users can continue using `xcode-27` or `xcode-27-xlarge` labels, with support limited to arm64 macOS runners.
https://github.blog/changelog/2026-09-10-xcode-27-runner-image-now-runs-on-macos-27
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