CodeQL cannot trace builds with Xcode 27 or analyze Swift 6.4, GitHub warns; pin macOS and Xcode to version 26 or earlier for traced scans. Intel Mac support is due for deprecation in mid-December.

GitHub’s original compatibility warning lists affected Xcode, macOS and Swift versions and the older-toolchain workaround.

Published 19 Oct 2026 · 13:39 UTC

GitHub Changelog ↗ · Source dated 19 Oct 2026

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