Index: README.md
===================================================================
--- README.md	(revision b632a7c694aa6b41c8683ae34c46ddd247dd06db)
+++ README.md	(revision 1d1c77e4e45598881a617b58774128a8dbdf592d)
@@ -2,2 +2,11 @@
 sudo apt-get install python3-tk
 
+On mac, install pygame like this:
+
+brew install python3
+
+# Not sure if this is actually needed
+brew install sdl sdl_image sdl_mixer sdl_ttf smpeg portmidi
+
+pip3 install pygame
+pip3 install pyobjc
Index: game.py
===================================================================
--- game.py	(revision b632a7c694aa6b41c8683ae34c46ddd247dd06db)
+++ game.py	(revision 1d1c77e4e45598881a617b58774128a8dbdf592d)
@@ -19,4 +19,11 @@
    w = root.winfo_screenwidth()
    h = root.winfo_screenheight()
+elif system == 'Darwin':
+   print("Mac detected")
+
+   from AppKit import NSScreen
+   res = NSScreen.mainScreen().frame().size
+   w = int(res.width)
+   h = int(res.height)
 else:
    print("Unknown OS: " + system)