https://github.com/python/cpython/commit/52810f997a3cb3a75ee2810717eda0dd67350390
commit: 52810f997a3cb3a75ee2810717eda0dd67350390
branch: 3.15
author: Miss Islington (bot) <[email protected]>
committer: hugovk <[email protected]>
date: 2026-07-06T09:50:26Z
summary:

[3.15] gh-145098: Use `macos-26-intel` instead of `macos-15-intel` (GH-149991) 
(#153179)

Co-authored-by: Hugo van Kemenade <[email protected]>

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 f5bec534d80cec6..1203355512e5bef 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -253,16 +253,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # macos-26 is Apple Silicon, macos-15-intel is Intel.
-        # macos-15-intel only runs tests against the GIL-enabled CPython.
+        # macos-26 is Apple Silicon, macos-26-intel is Intel.
+        # macos-26-intel only runs tests against the GIL-enabled CPython.
         os:
         - macos-26
-        - macos-15-intel
+        - macos-26-intel
         free-threading:
         - false
         - true
         exclude:
-        - os: macos-15-intel
+        - os: macos-26-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 93b419159fa8177..65a7f857fc4c779 100644
--- a/.github/workflows/reusable-macos.yml
+++ b/.github/workflows/reusable-macos.yml
@@ -54,15 +54,15 @@ jobs:
           --prefix=/opt/python-dev \
           --with-openssl="$(brew --prefix [email protected])"
     - name: Build CPython
-      if : ${{ inputs.free-threading || inputs.os != 'macos-15-intel' }}
+      if : ${{ inputs.free-threading || inputs.os != 'macos-26-intel' }}
       run: gmake -j8
     - name: Build CPython for compiler warning check
-      if : ${{ !inputs.free-threading && inputs.os == 'macos-15-intel' }}
+      if : ${{ !inputs.free-threading && inputs.os == 'macos-26-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-15-intel' }}
+      if : ${{ !inputs.free-threading && inputs.os == 'macos-26-intel' }}
       run: >-
         python3 Tools/build/check_warnings.py
         --compiler-output-file-path=compiler_output_macos.txt

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