diff --git a/src/GameWindow.c b/src/GameWindow.c
index acd0212..0355174 100644
--- a/src/GameWindow.c
+++ b/src/GameWindow.c
@@ -18,8 +18,6 @@ void GameWindow_Init(GameWindow *pGameWindow)
     }
     
     GameEngine_LoadLevel(&(pGameWindow->Engine), 0, false);
-    
-    CenterWindow(pGameWindow->Window);
 }
 
 void GameWindow_Draw(GameWindow *pGameWindow)
diff --git a/src/MacCommon.c b/src/MacCommon.c
index f1a9e82..d919102 100644
--- a/src/MacCommon.c
+++ b/src/MacCommon.c
@@ -3,11 +3,6 @@
 
 #include "MacCommon.h"
 
-void CenterWindow(WindowPtr window)
-{
-    // TODO
-}
-
 void ShowError(Str255 message, Boolean isFatal)
 {
     ParamText(message, EmptyString, EmptyString, EmptyString);
diff --git a/src/MacCommon.h b/src/MacCommon.h
index 3159031..05a2bc3 100644
--- a/src/MacCommon.h
+++ b/src/MacCommon.h
@@ -12,8 +12,8 @@
 
 #define ErrorAlertResID BaseResID
 
-void CenterWindow(WindowPtr window);
-Boolean IsCompactDisplay();
+pascal OSErr SetDialogDefaultItem(DialogPtr theDialog, short newItem) = { 0x303C, 0x0304, 0xAA68 };
+
 void ShowError(Str255 message, Boolean isFatal);
 
 #endif
diff --git a/src/MacLO.c b/src/MacLO.c
index bb2c920..583c44c 100644
--- a/src/MacLO.c
+++ b/src/MacLO.c
@@ -180,6 +180,9 @@ void MacLO_ShowAboutDialog()
     dialog = GetNewDialog(AboutDialogResID, nil, MoveToFront);
     
     SetPort(dialog);
+    
+    SetDialogDefaultItem(dialog, AboutDialogOKID);
+    
     ShowWindow(dialog);
     
     ModalDialog(nil, &itemHit);
diff --git a/src/MacLO.pi.rsrc.bin b/src/MacLO.pi.rsrc.bin
index b7a39ac..114a30e 100644
Binary files a/src/MacLO.pi.rsrc.bin and b/src/MacLO.pi.rsrc.bin differ