https://github.com/python/cpython/commit/cb76ab3819f778e55a3f49ddb1f681ee20978eda
commit: cb76ab3819f778e55a3f49ddb1f681ee20978eda
branch: main
author: Hugo van Kemenade <[email protected]>
committer: hugovk <[email protected]>
date: 2026-04-03T19:23:29+03:00
summary:

gh-145098: Use `macos-15-intel` instead of unstable `macos-26-intel` (#148038)

files:
M .github/workflows/build.yml
M .github/workflows/reusable-macos.yml

diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 025032a3ae68c4..a80262e3c0243c 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -206,16 +206,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # macos-26 is Apple Silicon, macos-26-intel is Intel.
-        # macos-26-intel only runs tests against the GIL-enabled CPython.
+        # macos-26 is Apple Silicon, macos-15-intel is Intel.
+        # macos-15-intel only runs tests against the GIL-enabled CPython.
         os:
         - macos-26
-        - macos-26-intel
+        - macos-15-intel
         free-threading:
         - false
         - true
         exclude:
-        - os: macos-26-intel
+        - os: macos-15-intel
           free-threading: true
     uses: ./.github/workflows/reusable-macos.yml
     with:
diff --git a/.github/workflows/reusable-macos.yml 
b/.github/workflows/reusable-macos.yml
index 9d8e6b03464ee3..785dcc77f54227 100644
--- a/.github/workflows/reusable-macos.yml
+++ b/.github/workflows/reusable-macos.yml
@@ -52,15 +52,15 @@ jobs:
           --prefix=/opt/python-dev \
           --with-openssl="$(brew --prefix [email protected])"
     - name: Build CPython
-      if : ${{ inputs.free-threading || inputs.os != 'macos-26-intel' }}
+      if : ${{ inputs.free-threading || inputs.os != 'macos-15-intel' }}
       run: gmake -j8
     - name: Build CPython for compiler warning check
-      if : ${{ !inputs.free-threading && inputs.os == 'macos-26-intel' }}
+      if : ${{ !inputs.free-threading && inputs.os == 'macos-15-intel' }}
       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-26-intel' }}
+      if : ${{ !inputs.free-threading && inputs.os == 'macos-15-intel' }}
       run: >-
         python3 Tools/build/check_warnings.py
         --compiler-output-file-path=compiler_output_macos.txt

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