GitHub CodeQL changes for macOS 27, Xcode 27, and Swift 6.4
GitHub announced changes to CodeQL for macOS 27 and Xcode 27. Apple no longer includes Intel (x86_64) code in some system binaries and libraries that CodeQL relies on to trace builds, and GitHub describes changes to how CodeQL supports Swift 6.4.
Why it matters
Teams running CodeQL code scanning on macOS build runners or analyzing Swift projects may see changed build tracing behavior once they move to macOS 27 and Xcode 27.
Who should care
Teams using GitHub CodeQL for Swift or macOS-based CI, iOS and macOS app developers, DevOps engineers managing macOS runners.
What you can do
Check your macOS runner and Xcode versions in CodeQL workflows and read the full GitHub changelog before upgrading to macOS 27 or Xcode 27.