diff --git a/Mac/Lib/FrameWork.py b/Mac/Lib/FrameWork.py
index f383609858e..82017f16dc2 100644
--- a/Mac/Lib/FrameWork.py
+++ b/Mac/Lib/FrameWork.py
@@ -153,7 +153,8 @@ class Application:
 	
 	def mainloop(self, mask = everyEvent, wait = None):
 		self.quitting = 0
-		saveparams = apply(MacOS.SchedParams, self.schedparams)
+		if hasattr(MacOS, 'SchedParams'):
+			saveparams = apply(MacOS.SchedParams, self.schedparams)
 		try:
 			while not self.quitting:
 				try:
@@ -164,7 +165,8 @@ class Application:
 					# applications.
 					break
 		finally:
-			apply(MacOS.SchedParams, saveparams)
+			if hasattr(MacOS, 'SchedParams'):
+				apply(MacOS.SchedParams, saveparams)
 	
 	def dopendingevents(self, mask = everyEvent):
 		"""dopendingevents - Handle all pending events"""
@@ -214,6 +216,8 @@ class Application:
 		
 	def asyncevents(self, onoff):
 		"""asyncevents - Set asynchronous event handling on or off"""
+		if MacOS.runtimemodel == 'macho':
+			raise 'Unsupported in MachoPython'
 		old = self._doing_asyncevents
 		if old:
 			MacOS.SetEventHandler()
@@ -257,7 +261,8 @@ class Application:
 			except AttributeError:
 				# Not menubar or something, so assume someone
 				# else's window
-				MacOS.HandleEvent(event)
+				if hasattr(MacOS, 'HandleEvent'):
+					MacOS.HandleEvent(event)
 				return		
 		elif self._windows.has_key(wid):
 			# It is a window. Hand off to correct window.
@@ -272,14 +277,17 @@ class Application:
 		handler(partcode, wid, event)
 
 	def do_inSysWindow(self, partcode, window, event):
-		MacOS.HandleEvent(event)
+		if hasattr(MacOS, 'HandleEvent'):
+			MacOS.HandleEvent(event)
 	
 	def do_inDesk(self, partcode, window, event):
-		MacOS.HandleEvent(event)
+		if hasattr(MacOS, 'HandleEvent'):
+			MacOS.HandleEvent(event)
 	
 	def do_inMenuBar(self, partcode, window, event):
 		if not self.menubar:
-			MacOS.HandleEvent(event)
+			if hasattr(MacOS, 'HandleEvent'):
+				MacOS.HandleEvent(event)
 			return
 		(what, message, when, where, modifiers) = event
 		result = MenuSelect(where)
@@ -294,7 +302,8 @@ class Application:
 			HiliteMenu(0)
 	
 	def do_menu(self, id, item, window, event):
-		MacOS.OutputSeen()
+		if hasattr(MacOS, 'OutputSeen'):
+			MacOS.OutputSeen()
 		self.menubar.dispatch(id, item, window, event)
 	
 	
@@ -303,11 +312,13 @@ class Application:
 		if DEBUG: print "Mouse down at global:", where
 		if DEBUG: print "\tUnknown part code:", partcode
 		if DEBUG: print "\tEvent:", self.printevent(event)
-		MacOS.HandleEvent(event)
+		if hasattr(MacOS, 'HandleEvent'):
+			MacOS.HandleEvent(event)
 		
 	def do_unknownwindow(self, partcode, window, event):
 		if DEBUG: print 'Unknown window:', window
-		MacOS.HandleEvent(event)
+		if hasattr(MacOS, 'HandleEvent'):
+			MacOS.HandleEvent(event)
 	
 	def do_keyDown(self, event):
 		self.do_key(event)
@@ -332,7 +343,8 @@ class Application:
 				raise self
 			else:
 				if not self.menubar:
-					MacOS.HandleEvent(event)
+					if hasattr(MacOS, 'HandleEvent'):
+						MacOS.HandleEvent(event)
 				return
 		else:
 			# See whether the front window wants it
@@ -356,7 +368,8 @@ class Application:
 			window = self._windows[wid]
 			window.do_rawupdate(wid, event)
 		else:
-			MacOS.HandleEvent(event)
+			if hasattr(MacOS, 'HandleEvent'):
+				MacOS.HandleEvent(event)
 	
 	def do_activateEvt(self, event):
 		(what, message, when, where, modifiers) = event
@@ -365,7 +378,8 @@ class Application:
 			window = self._windows[wid]
 			window.do_activate(modifiers & 1, event)
 		else:
-			MacOS.HandleEvent(event)
+			if hasattr(MacOS, 'HandleEvent'):
+				MacOS.HandleEvent(event)
 	
 	def do_osEvt(self, event):
 		(what, message, when, where, modifiers) = event