diff --git a/.github/workflows/gamma_f77.yml b/.github/workflows/gamma_f77.yml
index 0ca7f1b..8fc3168 100644
--- a/.github/workflows/gamma_f77.yml
+++ b/.github/workflows/gamma_f77.yml
@@ -53,8 +53,10 @@ jobs:
       - uses: actions/checkout@v3
         with:
           fetch-depth: '0'
-      - name: update-tools
-        run: sudo apt install gcc-12 g++-12
+      - name: update-tools-gcc-12
+        run: brew install gcc-12
+      - name: update-tools-g++-12
+        run: brew install g++-12
       - name: macos-native
         run: |
           ${{ matrix.compiler }} -xf77 -O2 gamma.f -lgfortran -lquadmath -o gamma.exe