Index: Lib/idlelib/Bindings.py
===================================================================
--- Lib/idlelib/Bindings.py	(revision 46048)
+++ Lib/idlelib/Bindings.py	(working copy)
@@ -80,6 +80,32 @@
    ]),
 ]
 
+import sys
+if sys.platform == 'darwin' and '.app' in sys.executable:
+    # Running as a proper MacOS application bundle. This block restructures
+    # the menus a little to make them conform better to the HIG.
+
+    quitItem = menudefs[0][1][-1]
+    closeItem = menudefs[0][1][-2]
+
+    # Remove the last 3 items of the file menu: a separator, close window and
+    # quit. Close window will be reinserted just above the save item, where
+    # it should be according to the HIG. Quit is in the application menu.
+    del menudefs[0][1][-3:]
+    menudefs[0][1].insert(6, closeItem)
+
+    # Remove the 'About' entry from the help menu, it is in the application 
+    # menu
+    del menudefs[-1][1][0:2]
+
+    menudefs.insert(0,
+            ('application', [
+                ('About IDLE', '<<about-idle>>'),
+                None,
+                ('_Preferences....', '<<open-config-dialog>>'),
+            ]))
+
+
 default_keydefs = idleConf.GetCurrentKeySet()
 
 del sys
Index: Lib/idlelib/PyShell.py
===================================================================
--- Lib/idlelib/PyShell.py	(revision 46048)
+++ Lib/idlelib/PyShell.py	(working copy)
@@ -777,6 +777,10 @@
         ("help", "_Help"),
     ]
 
+    if sys.platform in 'darwin' and 'IDLE.app' in sys.argv[0]:
+        del menu_specs[-3]
+
+
     # New classes
     from IdleHistory import History
 
@@ -1289,6 +1293,21 @@
         and "foobar" in sys.argv[1].
 """
 
+def macosxAddOpenEvent(root, flist):
+    """
+    This ensures that the application will respont to open AppleEvents, which
+    makes is feaseable to use IDLE as the default application for python files.
+    """
+
+    def doOpenFile(*args):
+        for fn in args:
+            flist.open(fn)
+           
+    # The command below is a hook in aquatk that is called whenever the app
+    # receives a file open event. The callback can have multiple arguments,
+    # one for every file that should be opened.
+    root.createcommand("::tk::mac::OpenDocument", doOpenFile)
+
 def main():
     global flist, root, use_subprocess
 
@@ -1371,9 +1390,19 @@
     enable_shell = enable_shell or not edit_start
     # start editor and/or shell windows:
     root = Tk(className="Idle")
+
+    if sys.platform == 'darwin' and 'IDLE.app' in sys.argv[0]:
+        # The Aqua version of Tcl/Tk on MacOS will open a console window
+        # when stdin is an empty file, as it is in application bundles. Close
+        # the window as soon as possible to avoid actually showing it to the 
+        # user.
+        root.tk.call('console', 'hide')
     fixwordbreaks(root)
     root.withdraw()
     flist = PyShellFileList(root)
+
+    if sys.platform == 'darwin' and 'IDLE.app' in sys.argv[0]:
+        macosxAddOpenEvent(root, flist)
     if enable_edit:
         if not (cmd or script):
             for filename in args:
@@ -1403,6 +1432,7 @@
         elif script:
             shell.interp.prepend_syspath(script)
             shell.interp.execfile(script)
+
     root.mainloop()
     root.destroy()
 
Index: Lib/idlelib/keybindingDialog.py
===================================================================
--- Lib/idlelib/keybindingDialog.py	(revision 46048)
+++ Lib/idlelib/keybindingDialog.py	(working copy)
@@ -133,7 +133,7 @@
         config-keys.def must use the same ordering.
         """
         import sys
-        if sys.platform == 'darwin' and sys.executable.count('.app'):
+        if sys.platform == 'darwin' and sys.argv[0].count('.app'):
             self.modifiers = ['Shift', 'Control', 'Option', 'Command']
         else:
             self.modifiers = ['Control', 'Alt', 'Shift']
Index: Lib/idlelib/EditorWindow.py
===================================================================
--- Lib/idlelib/EditorWindow.py	(revision 46048)
+++ Lib/idlelib/EditorWindow.py	(working copy)
@@ -66,9 +66,18 @@
                                        'Python%d%d.chm' % sys.version_info[:2])
                 if os.path.isfile(chmfile):
                     dochome = chmfile
+
+            elif sys.platform == 'darwin' and 'IDLE.app' in sys.argv[0]:
+                # documentation is stored inside the python framework
+                dochome = os.path.join(sys.prefix,
+                        'Resources/English.lproj/Documentation/index.html')
+
             dochome = os.path.normpath(dochome)
             if os.path.isfile(dochome):
                 EditorWindow.help_url = dochome
+                if sys.platform == 'darwin':
+                    # Safari requires real file:-URLs
+                    EditorWindow.help_url = 'file://' + EditorWindow.help_url
             else:
                 EditorWindow.help_url = "http://www.python.org/doc/current"
         currentTheme=idleConf.CurrentTheme()
@@ -278,6 +287,10 @@
 
     def set_status_bar(self):
         self.status_bar = self.MultiStatusBar(self.top)
+        if sys.platform == 'darwin' and 'IDLE.app' in sys.argv[0]:
+            # Insert some padding to avoid obscuring some of the statusbar
+            # by the resize widget.
+            self.status_bar.set_label('_padding1', '    ', side=RIGHT)
         self.status_bar.set_label('column', 'Col: ?', side=RIGHT)
         self.status_bar.set_label('line', 'Ln: ?', side=RIGHT)
         self.status_bar.pack(side=BOTTOM, fill=X)
@@ -301,6 +314,9 @@
         ("help", "_Help"),
     ]
 
+    if sys.platform == 'darwin' and 'IDLE.app' in sys.argv[0]:
+        del menu_specs[-3]
+
     def createmenubar(self):
         mbar = self.menubar
         self.menudict = menudict = {}
@@ -308,6 +324,12 @@
             underline, label = prepstr(label)
             menudict[name] = menu = Menu(mbar, name=name)
             mbar.add_cascade(label=label, menu=menu, underline=underline)
+
+        if sys.platform == 'darwin' and '.framework' in sys.executable:
+            # Insert the application menu
+            menudict['application'] = menu = Menu(mbar, name='apple')
+            mbar.add_cascade(label='IDLE', menu=menu)
+
         self.fill_menus()
         self.base_helpmenu_length = self.menudict['help'].index(END)
         self.reset_help_menu_entries()