Does the Xcode 27 runner use the macOS 27 image?
GitHub’s runner-image documentation identifies Xcode 27 as a macOS 27 runner image. The exact installed Xcode and SDK revisions can change with image updates, so teams should inspect the image’s current software manifest when a build depends on a specific point release.
Answered in
GitHub’s Xcode 27 Actions Runner Is GA and Apple-Silicon OnlyThe new xcode-27 labels bring macOS 27 and Xcode 27 to GitHub Actions, but only on arm64. Audit native dependencies before moving an iOS build.
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