diff --git a/src/main/macosx/SDLMain.m b/src/main/macosx/SDLMain.m
index 8068cee08..405ac2dfa 100644
--- a/src/main/macosx/SDLMain.m
+++ b/src/main/macosx/SDLMain.m
@@ -245,6 +245,9 @@ static void CustomApplicationMain (argc, argv)
  */
 - (BOOL)application:(NSApplication *)theApplication openFile:(NSString *)filename
 {
+    if (!gFinderLaunch)  /* MacOS is passing command line args. */
+        return FALSE;
+
     if (gCalledAppMainline)  /* app has started, ignore this document. */
         return FALSE;