Fix for issue8868: without this patch 'MacOS.WMAvailable()' will return
False on MacOSX 10.5 or earlier and scripts won't be able to access GUI
functionality.
diff --git a/Mac/Tools/pythonw.c b/Mac/Tools/pythonw.c
index 7f45ca9..08e069b 100644
--- a/Mac/Tools/pythonw.c
+++ b/Mac/Tools/pythonw.c
@@ -149,6 +149,14 @@
 main(int argc, char **argv) {
     char* exec_path = get_python_path();
 
+    /*
+     * Let argv[0] refer to the new interpreter. This is needed to
+     * get the effect we want on OSX 10.5 or earlier. That is, without
+     * changing argv[0] the real interpreter won't have access to
+     * the Window Server.
+     */
+    argv[0] = exec_path;
+
 #ifdef HAVE_SPAWN_H
 
     /* We're weak-linking to posix-spawnv to ensure that