ci: migrate deprecating macos-13 to macos-15-intel

macos-13 will have Github Actions brownouts starting November 4th, and will be unsupported by December 4th.
Note macos-15-intel planned to end August 2027.

Author: jet-tong

.github/workflows/python-integration.yml

@@ -32,7 +32,8 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        runner: [ubuntu-22.04, macos-13, macos-14]
+        # macos-15-intel planned to end August 2027
+        runner: [ubuntu-22.04, macos-15-intel, macos-14]
         python-version: ["3.8", "3.9", "3.10", "3.11", "3.12", "3.13"]
         test-run:
           - name: "S3"
@@ -50,8 +51,8 @@ jobs:
             profile-role: ${{ vars.PROFILE_IAM_ROLE }}
             profile-bucket: ${{ vars.S3_EXPRESS_PROFILE_BUCKET }}
         exclude:
-          # For Python 3.13, PyTorch does not support macos-13/x86_64, only macos-14/arm64.
-          - runner: macos-13
+          # For Python 3.13, PyTorch does not support macos-15-intel/x86_64, only macos-14/arm64.
+          - runner: macos-15-intel
             python-version: "3.13"
           - runner: macos-14
             python-version: "3.8"
@@ -136,11 +137,11 @@ jobs:
           pytest s3torchconnector/tst/e2e/test_e2e_s3_lightning_checkpoint.py -n auto
 
       - name: Install DCP dependencies
-        if: matrix.runner != 'macos-13'
+        if: matrix.runner != 'macos-15-intel'
         run: |
           python -m pip install './s3torchconnector[dcp-test]'
       - name: Run s3torchconnector DCP e2e tests
-        if: matrix.runner != 'macos-13'
+        if: matrix.runner != 'macos-15-intel'
         run: |
           CI_REGION=${{ matrix.test-run.region }} \
           CI_BUCKET=${{ matrix.test-run.bucket }} \

.github/workflows/rust-checks.yml

@@ -70,7 +70,8 @@ jobs:
     name: Rust tests
     strategy:
       matrix:
-        runner: [ubuntu-22.04, macos-13]
+        # macos-15-intel planned to end August 2027
+        runner: [ubuntu-22.04, macos-15-intel]
     steps:
       - name: Checkout code
         uses: actions/checkout@v5

.github/workflows/wheels.yml

@@ -45,17 +45,18 @@ jobs:
 #          - runner: ubuntu-20.04
 #            kind: manylinux
 #            arch: x86_64
-          - runner: macos-13
+          # macos-15-intel planned to end August 2027
+          - runner: macos-15-intel
             kind: macosx
             arch: x86_64
           - runner: macos-14
             kind: macosx
             arch: arm64
-        # cp313 macos-13 (x86_64) is not supported by PyTorch
+        # cp313 macos-15-intel (x86_64) is not supported by PyTorch
         exclude:
           - python: cp313
             builder:
-              runner: macos-13
+              runner: macos-15-intel
               kind: macosx
               arch: x86_64
     permissions: