From 2ccc917427549fce9c35a1fb81731bd90d383d01 Mon Sep 17 00:00:00 2001
From: "Miss Islington (bot)"
 <31488909+miss-islington@users.noreply.github.com>
Date: Wed, 25 Mar 2026 12:41:12 +0100
Subject: [PATCH 1/2] [3.13] gh-145098: Run Apple Silicon macOS CI on macos-26
 (Tahoe) (GH-145099) (GH-146412) (cherry picked from commit
 ce789046015205bb2a0ad92c669287d8c3519615)

Co-authored-by: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com>
Co-authored-by: clintonsteiner <47841949+clintonsteiner@users.noreply.github.com>
---
 .github/actionlint.yaml     |  5 +++++
 .github/workflows/build.yml | 12 ++++++------
 .github/workflows/jit.yml   |  2 +-
 3 files changed, 12 insertions(+), 7 deletions(-)

diff --git a/.github/actionlint.yaml b/.github/actionlint.yaml
index eacfff24889021..3004466b80e91c 100644
--- a/.github/actionlint.yaml
+++ b/.github/actionlint.yaml
@@ -1,3 +1,8 @@
+self-hosted-runner:
+  # Pending release of actionlint > 1.7.11 for macos-26-intel support
+  # https://github.com/rhysd/actionlint/pull/629
+  labels: ["macos-26-intel"]
+
 config-variables: null
 
 paths:
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5ec0c8967ef58e..a95a1f233c4af0 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -246,16 +246,16 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        # macos-14 is M1, 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-14
-        - macos-15-intel
+        - macos-26
+        - 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:
@@ -341,7 +341,7 @@ jobs:
       matrix:
         include:
           - arch: aarch64
-            runs-on: macos-14
+            runs-on: macos-26
           - arch: x86_64
             runs-on: ubuntu-24.04
 
diff --git a/.github/workflows/jit.yml b/.github/workflows/jit.yml
index 70b74ce5c7f5a4..e62756f8fb8023 100644
--- a/.github/workflows/jit.yml
+++ b/.github/workflows/jit.yml
@@ -82,7 +82,7 @@ jobs:
             compiler: msvc
           - target: x86_64-apple-darwin/clang
             architecture: x86_64
-            runner: macos-15-intel
+            runner: macos-26-intel
             compiler: clang
           - target: aarch64-apple-darwin/clang
             architecture: aarch64

From c8a48832e1d57836505109c887afa756b6b1956f Mon Sep 17 00:00:00 2001
From: Hugo van Kemenade <1324225+hugovk@users.noreply.github.com>
Date: Wed, 25 Mar 2026 13:55:14 +0200
Subject: [PATCH 2/2] fixup! [3.13] gh-145098: Run Apple Silicon macOS CI on
 macos-26 (Tahoe) (GH-145099) (GH-146412) (cherry picked from commit
 ce789046015205bb2a0ad92c669287d8c3519615)

---
 .github/workflows/jit.yml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/.github/workflows/jit.yml b/.github/workflows/jit.yml
index e62756f8fb8023..fc019fb0d32677 100644
--- a/.github/workflows/jit.yml
+++ b/.github/workflows/jit.yml
@@ -86,7 +86,7 @@ jobs:
             compiler: clang
           - target: aarch64-apple-darwin/clang
             architecture: aarch64
-            runner: macos-14
+            runner: macos-26
             compiler: clang
           - target: x86_64-unknown-linux-gnu/gcc
             architecture: x86_64