DEV: Test with macOS as well

.github/workflows/github-ci.yaml

@@ -1,5 +1,5 @@
 # This workflow will install Python dependencies, run tests and lint with a variety of Python versions
-# For more information see: https://help.github.com/actions/language-and-framework-guides/using-python-with-github-actions
+# For more information see: https://docs.github.com/en/actions/tutorials/build-and-test-code/python
 
 name: CI
 
@@ -51,6 +51,40 @@ jobs:
       run: |
         python -m pytest tests --cov=pypdf --cov-append -n auto -vv -p no:benchmark
 
+  test_macos:
+    name: pytest on macOS
+    runs-on: macos-latest
+    steps:
+    - name: Checkout Code
+      uses: actions/checkout@v4
+      with:
+        submodules: 'recursive'
+    - name: Setup Python (3.11+)
+      uses: actions/setup-python@v5
+      with:
+        python-version: 3.13  # latest stable python
+        allow-prereleases: true
+    - name: Upgrade pip
+      run: |
+        python -m pip install --upgrade pip
+    - name: Install requirements (Python 3.11+)
+      run: |
+        pip install -r requirements/ci-3.11.txt
+    - name: Install cryptography
+      run: |
+        pip install cryptography
+    - name: Install OS dependencies
+      run:
+        brew install ghostscript jbig2dec poppler
+    - name: Install pypdf
+      run: |
+        pip install .
+    - name: Prepare
+      run: |
+        python -c "from tests import download_test_pdfs; download_test_pdfs()"
+    - name: Test with pytest
+      run: |
+        python -m pytest tests --cov=pypdf --cov-append -n auto -vv -p no:benchmark
 
   tests:
     name: "pytest on ${{ matrix.python-version }} (crypto-lib: ${{ matrix.use-crypto-lib }})"