Macos 26 is not yet ready for wide usage (#86)

Author: gaborbernat

.github/workflows/pyproject_fmt_build.yaml

@@ -152,9 +152,9 @@ jobs:
       fail-fast: false
       matrix:
         platform:
-          - runner: macos-26
+          - runner: macos-15
             target: x86_64
-          - runner: macos-26
+          - runner: macos-15
             target: aarch64
     steps:
       - name: Download the code

.github/workflows/pyproject_fmt_test.yaml

@@ -65,7 +65,7 @@ jobs:
         os:
           - ubuntu-24.04
           - windows-2025
-          - macos-26
+          - macos-15
     defaults:
       run:
         working-directory: pyproject-fmt

.github/workflows/tox_toml_fmt_build.yaml

@@ -152,9 +152,9 @@ jobs:
       fail-fast: false
       matrix:
         platform:
-          - runner: macos-26
+          - runner: macos-15
             target: x86_64
-          - runner: macos-26
+          - runner: macos-15
             target: aarch64
     steps:
       - name: Download the code

.github/workflows/tox_toml_fmt_test.yaml

@@ -65,7 +65,7 @@ jobs:
         os:
           - ubuntu-24.04
           - windows-2025
-          - macos-26
+          - macos-15
     defaults:
       run:
         working-directory: tox-toml-fmt