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fix: update sf-089 — macos-14 pin replaced with macos-15 (deprecation July 6 2026) #433

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fix: update sf-089 — macos-14 pin replaced with macos-15 (deprecation July 6 2026) #433

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14 changes: 8 additions & 6 deletions errors/silent-failures/macos-latest-upgraded-to-macos-15-xcode-16-swift-6.yml
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Original file line number Diff line number Diff line change
Expand Up @@ -28,8 +28,9 @@ root_cause: |
appear to run normally until the Swift compiler raises concurrency errors on previously clean code.
This mirrors the ubuntu-latest → ubuntu-24.04 silent label change (see silent-failures-059).
fix: |
Option 1 — Pin to macos-14 until your codebase is Swift 6 ready:
runs-on: macos-14
Option 1 — Pin to macos-15 until your codebase is Swift 6 ready:
runs-on: macos-15
Note: macOS 14 deprecation begins July 6, 2026 — do NOT pin to macos-14.

Option 2 — Disable strict concurrency checking temporarily:
Add SWIFT_STRICT_CONCURRENCY=minimal to xcodebuild arguments.
Expand All @@ -39,12 +40,13 @@ fix: |
Use async/await and actors for shared mutable state.
fix_code:
- language: yaml
label: "Pin to macos-14 until Swift 6 migration is complete"
label: "Pin to macos-15 until Swift 6 migration is complete (macos-14 deprecated July 2026)"
code: |
jobs:
build:
runs-on: macos-14 # Pinned — avoids Xcode 16 Swift 6 strictness
# Use macos-15 once concurrency issues are resolved
# Pin to macos-15 — avoids Xcode 16 Swift 6 strictness from macos-latest
# DO NOT pin to macos-14: deprecated starting July 6, 2026 (retired Nov 2, 2026)
runs-on: macos-15
steps:
- uses: actions/checkout@v4
- name: Build and test
Expand All @@ -58,7 +60,7 @@ fix_code:
-scheme MyApp \
SWIFT_STRICT_CONCURRENCY=minimal
prevention:
- "Pin to a specific macOS version (macos-14, macos-15) instead of macos-latest for stability"
- "Pin to a specific macOS version (macos-15, macos-26) instead of macos-latest for stability; do NOT use macos-14 as it is deprecated starting July 6, 2026"
- "Follow GitHub Changelog for macos-latest label change announcements before they happen"
- "Run Xcode 16 locally with Swift strict concurrency enabled before CI failures surface"
- "Add a step printing runner OS version (sw_vers) to detect unexpected runner upgrades"
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