[CI] Add MacOS 27 to nightly testing - #1267
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🟢 Approval recommended
The runner configuration and documentation consistently add valid macOS 27 nightly coverage.
Review effort: Balanced
Findings: None
What changed in this PR
Adds macOS 27 public-preview coverage to nightly validation.
Changes:
- Registers the
xcode-27runner for Seatbelt tests. - Adds macOS 27 to the nightly plan and CI documentation.
| File | Description |
|---|---|
scripts/ci/validation-test-matrix.json |
Adds macOS 27 and schedules Seatbelt nightly. |
docs/ci-validation-infrastructure.md |
Documents the runner and updated platform count. |
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Elliot (theelliotm)
marked this pull request as ready for review
September 24, 2026 21:23
Gudge (MGudgin)
approved these changes
Sep 24, 2026
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📖 Description
Adds GitHub's public preview of MacOS 27 to the list of OS versions that get tested.
🔗 References
🔍 Validation
Ran tests locally on MacOS 27 machine - all passed.
Tested in CI: https://github.com/microsoft/mxc/actions/runs/36058320446/job/107837628455
✅ Checklist
Cargo.lock, thedependency-feed-checkcheck passes (see docs/pull-requests.md)📋 Issue Type
Microsoft Reviewers: Open in CodeFlow