diff --git a/.github/workflows/pip_install_gmpy2.yml b/.github/workflows/pip_install_gmpy2.yml
index 3c090b6c..42c20f3e 100644
--- a/.github/workflows/pip_install_gmpy2.yml
+++ b/.github/workflows/pip_install_gmpy2.yml
@@ -8,7 +8,7 @@ jobs:
       fail-fast: false
       matrix:
         python-version: [3.11, 3.12, 3.13]
-        os: [macos-latest]
+        os: [macos-12]
     runs-on: ${{ matrix.os }}
     steps:
       - uses: actions/checkout@v4