fix

Author: flagarde

.github/workflows/macOS.yml

@@ -126,12 +126,12 @@ jobs:
         run: cmake --install ${{ env.CMAKE_BINARY_PREFIX }} --prefix ${{ env.CMAKE_INSTALL_PREFIX }} --config ${{ env.CMAKE_BUILD_TYPE }}
 
   gcc:
-    runs-on: macos-15
-    name: macos-15 gcc-${{ matrix.version }} (c++${{ matrix.standard }})
+    runs-on: macos-14
+    name: macos-14 gcc-${{ matrix.version }} (c++${{ matrix.standard }})
     strategy:
       fail-fast: false
       matrix:
-        version: [ 12, 13, 14 ]
+        version: [ 9, 10, 11, 12, 13, 14, 15 ]
         standard: [ 11, 14, 17, 20 ]
 
     steps: