gh-137638: Use macos-15-intel in GitHub Actions

.github/actionlint.yaml

@@ -1,6 +1,6 @@
 self-hosted-runner:
   # Pending https://github.com/rhysd/actionlint/issues/533
-  labels: ["windows-11-arm"]
+  labels: ["windows-11-arm", "macos-15-intel"]
 
 config-variables: null
 

.github/workflows/build.yml

@@ -202,13 +202,13 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # Cirrus and macos-14 are M1, macos-13 is default GHA Intel.
+        # Cirrus and macos-14 are M1, macos-15 is default GHA Intel.
         # macOS 13 only runs tests against the GIL-enabled CPython.
         # Cirrus used for upstream, macos-14 for forks.
         os:
         - ghcr.io/cirruslabs/macos-runner:sonoma
         - macos-14
-        - macos-13
+        - macos-15
         is-fork:  # only used for the exclusion trick
         - ${{ github.repository_owner != 'python' }}
         free-threading:
@@ -219,7 +219,7 @@ jobs:
           is-fork: true
         - os: macos-14
           is-fork: false
-        - os: macos-13
+        - os: macos-15
           free-threading: true
     uses: ./.github/workflows/reusable-macos.yml
     with:

.github/workflows/jit.yml

@@ -81,7 +81,7 @@ jobs:
             runner: windows-11-arm
           - target: x86_64-apple-darwin/clang
             architecture: x86_64
-            runner: macos-13
+            runner: macos-15-intel
           - target: aarch64-apple-darwin/clang
             architecture: aarch64
             runner: macos-14
@@ -108,8 +108,9 @@ jobs:
 
         # The `find` line is required as a result of https://github.com/actions/runner-images/issues/9966.
         # This is a bug in the macOS runner image where the pre-installed Python is installed in the same
-        # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes
-        # the symlink to the pre-installed Python so that the Homebrew Python is used instead.
+        # directory as the Homebrew Python, which causes the build to fail for macos-15
+        # (was 13, see if bug still exists?) This line removes the symlink to the pre-installed Python so
+        # that the Homebrew Python is used instead.
       - name: macOS
         if: runner.os == 'macOS'
         run: |

.github/workflows/reusable-macos.yml

@@ -60,15 +60,15 @@ jobs:
           --prefix=/opt/python-dev \
           --with-openssl="$(brew --prefix [email protected])"
     - name: Build CPython
-      if : ${{ inputs.free-threading || inputs.os != 'macos-13' }}
+      if : ${{ inputs.free-threading || inputs.os != 'macos-15' }}
       run: gmake -j8
     - name: Build CPython for compiler warning check
-      if : ${{ !inputs.free-threading && inputs.os == 'macos-13' }}
+      if : ${{ !inputs.free-threading && inputs.os == 'macos-15' }}
       run: set -o pipefail; gmake -j8 --output-sync 2>&1 | tee compiler_output_macos.txt
     - name: Display build info
       run: make pythoninfo
     - name: Check compiler warnings
-      if : ${{ !inputs.free-threading && inputs.os == 'macos-13' }}
+      if : ${{ !inputs.free-threading && inputs.os == 'macos-15' }}
       run: >-
         python3 Tools/build/check_warnings.py
         --compiler-output-file-path=compiler_output_macos.txt

.github/workflows/tail-call.yml

@@ -58,7 +58,7 @@ jobs:
 #            runner: windows-2022
           - target: x86_64-apple-darwin/clang
             architecture: x86_64
-            runner: macos-13
+            runner: macos-15
           - target: aarch64-apple-darwin/clang
             architecture: aarch64
             runner: macos-14
@@ -103,7 +103,7 @@ jobs:
 
         # The `find` line is required as a result of https://github.com/actions/runner-images/issues/9966.
         # This is a bug in the macOS runner image where the pre-installed Python is installed in the same
-        # directory as the Homebrew Python, which causes the build to fail for macos-13. This line removes
+        # directory as the Homebrew Python, which causes the build to fail for macos-15. This line removes
         # the symlink to the pre-installed Python so that the Homebrew Python is used instead.
         # Note: when a new LLVM is released, the homebrew installation directory changes, so the builds will fail.
         # We either need to upgrade LLVM or change the directory being pointed to.