Use MacOS runner with M1.

.github/workflows/main.yml

@@ -23,7 +23,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        os: ['ubuntu-latest', 'macos-latest', 'windows-latest']
+        os: ['ubuntu-latest', 'macos-14', 'windows-latest']
         python-version: ['3.8', '3.9', '3.10', '3.11', '3.12']
 
     steps:
@@ -40,9 +40,6 @@ jobs:
           sudo apt-get update
           sudo apt-get install graphviz graphviz-dev
 
-      - if: matrix.os == 'macos-latest'
-        run: brew install graphviz
-
       # Unit, integration, and end-to-end tests.
 
       - name: Run unit tests and doctests.

tests/test_dag_command.py

@@ -16,10 +16,10 @@
 else:
     _IS_PYGRAPHVIZ_INSTALLED = True
 
-# Test should run always on remote except on Windows and locally only with the package
-# installed.
+# Test should run always on remote except on Windows and MacOS with M1 and locally only
+# with the package installed.
 _TEST_SHOULD_RUN = _IS_PYGRAPHVIZ_INSTALLED or (
-    os.environ.get("CI") and sys.platform != "win32"
+    os.environ.get("CI") and sys.platform not in ("win32", "darwin")
 )
 _GRAPH_LAYOUTS = ["neato", "dot", "fdp", "sfdp", "twopi", "circo"]
 _TEST_FORMATS = ["dot", "pdf", "png", "jpeg", "svg"]

tox.ini

@@ -9,7 +9,7 @@ package = editable
 [testenv:test]
 extras = test
 deps =
-    pygraphviz;platform_system != "Windows"
+    pygraphviz;platform_system == "Linux"
 commands =
     pytest --nbmake {posargs}