diff --git a/.github/workflows/cmake.yml b/.github/workflows/cmake.yml
index 9a2eeea3..ba669730 100644
--- a/.github/workflows/cmake.yml
+++ b/.github/workflows/cmake.yml
@@ -26,7 +26,9 @@ jobs:
           - { os: ubuntu-latest, CC: clang,    CXX: clang++,    python: '3.11' }
           - { os: ubuntu-latest, CC: gcc-12,   CXX: g++-12,     python: '3.11' }
           - { os: macos-11,      CC: clang,    CXX: clang++,    python: "3.10" }
-          - { os: macos-latest,  CC: clang,    CXX: clang++,    python: "3.11" }
+          - { os: macos-12,      CC: clang,    CXX: clang++,    python: "3.11" }
+          - { os: macos-13,      CC: clang,    CXX: clang++,    python: "3.11" }
+    #macos-latest is just macos-12 by August 2023!      - { os: macos-latest,  CC: clang,    CXX: clang++,    python: "3.11" }
     name: ${{ matrix.os }}.${{ matrix.CC }}.python-${{ matrix.python }}
     runs-on: ${{ matrix.os }}
     env: