screeninfo optional on macos

setup.py

@@ -48,7 +48,7 @@ setup(
         "kivy_deps.gstreamer;platform_system=='Windows'",
         "kivy>=2.0.0rc2",
         "kivymd>=0.104.1",
-        "screeninfo",  # for screen resolution
+        "screeninfo;platform_system!='Darwin'",  # for screen resolution, has problems on macos
     ],
     python_requires=">=3.6, <4",
     entry_points={"console_scripts": ["katrain=katrain.__main__:run_app"]},