Fix MacOS pygame no hardware accelerated device error (#1190)

Author: elliottower

.github/workflows/macos-test.yml

@@ -3,25 +3,33 @@ name: MacOS tests
 
 on:
     push:
-        branches: [master]
+        branches: [none]
 
 permissions:
     contents: read
 
 jobs:
     macos-test:
-        runs-on: macos-11
+        runs-on: ${{ matrix.os }}
+        strategy:
+            matrix:
+            # Big Sur, Monterey
+                os: [macos-11, macos-12]
+                python-version: ['3.8', '3.9', '3.10', '3.11']
         steps:
             - uses: actions/checkout@v4
-            - name: Set up Python 3.11
+            - name: Set up Python ${{ matrix.python-version }}
               uses: actions/setup-python@v4
               with:
-                  python-version: 3.11
+                  python-version: ${{ matrix.python-version }}
             - name: Install dependencies
               run: |
                   pip install -e .[all]
                   pip install -e .[testing]
                   AutoROM -v
+            - name: Set dummy SDL video driver
+              run: |
+                  export SDL_VIDEODRIVER=dummy
             - name: Full Python tests
               run: |
                   pytest -v --cov=pettingzoo --cov-report term