diff --git a/wxPython/src/mac/help.cpp b/wxPython/src/mac/help.cpp
index a658f1c2da..2c75000062 100644
--- a/wxPython/src/mac/help.cpp
+++ b/wxPython/src/mac/help.cpp
@@ -719,7 +719,7 @@ static PyObject *_wrap_wxHelpProvider_ShowHelp(PyObject *self, PyObject *args, P
     PyObject * _resultobj;
     bool  _result;
     wxHelpProvider * _arg0;
-    wxWindowBase * _arg1;
+    wxWindow * _arg1;
     PyObject * _argo0 = 0;
     PyObject * _argo1 = 0;
     char *_kwnames[] = { "self","window", NULL };
@@ -736,8 +736,8 @@ static PyObject *_wrap_wxHelpProvider_ShowHelp(PyObject *self, PyObject *args, P
     }
     if (_argo1) {
         if (_argo1 == Py_None) { _arg1 = NULL; }
-        else if (SWIG_GetPtrObj(_argo1,(void **) &_arg1,"_wxWindowBase_p")) {
-            PyErr_SetString(PyExc_TypeError,"Type error in argument 2 of wxHelpProvider_ShowHelp. Expected _wxWindowBase_p.");
+        else if (SWIG_GetPtrObj(_argo1,(void **) &_arg1,"_wxWindow_p")) {
+            PyErr_SetString(PyExc_TypeError,"Type error in argument 2 of wxHelpProvider_ShowHelp. Expected _wxWindow_p.");
         return NULL;
         }
     }
@@ -755,7 +755,7 @@ static PyObject *_wrap_wxHelpProvider_ShowHelp(PyObject *self, PyObject *args, P
 static PyObject *_wrap_wxHelpProvider_AddHelp(PyObject *self, PyObject *args, PyObject *kwargs) {
     PyObject * _resultobj;
     wxHelpProvider * _arg0;
-    wxWindowBase * _arg1;
+    wxWindow * _arg1;
     wxString * _arg2;
     PyObject * _argo0 = 0;
     PyObject * _argo1 = 0;
@@ -774,8 +774,8 @@ static PyObject *_wrap_wxHelpProvider_AddHelp(PyObject *self, PyObject *args, Py
     }
     if (_argo1) {
         if (_argo1 == Py_None) { _arg1 = NULL; }
-        else if (SWIG_GetPtrObj(_argo1,(void **) &_arg1,"_wxWindowBase_p")) {
-            PyErr_SetString(PyExc_TypeError,"Type error in argument 2 of wxHelpProvider_AddHelp. Expected _wxWindowBase_p.");
+        else if (SWIG_GetPtrObj(_argo1,(void **) &_arg1,"_wxWindow_p")) {
+            PyErr_SetString(PyExc_TypeError,"Type error in argument 2 of wxHelpProvider_AddHelp. Expected _wxWindow_p.");
         return NULL;
         }
     }
diff --git a/wxPython/src/mac/wx.py b/wxPython/src/mac/wx.py
index dcc1f689e5..fc8a51fd1d 100644
--- a/wxPython/src/mac/wx.py
+++ b/wxPython/src/mac/wx.py
@@ -1708,8 +1708,97 @@ def wxCallAfter(callable, *args, **kw):
     evt.kw = kw
     wxPostEvent(app, evt)
 
-# an alias
-wxRunLater = wxCallAfter
+
+#----------------------------------------------------------------------
+
+
+class wxFutureCall:
+    """
+    A convenience class for wxTimer, that calls the given callable
+    object once after the given amount of milliseconds, passing any
+    positional or keyword args.  The return value of the callable is
+    availbale after it has been run with the GetResult method.
+
+    If you don't need to get the return value or restart the timer
+    then there is no need to hold a reference to this object.  It will
+    hold a reference to itself while the timer is running (the timer
+    has a reference to self.Notify) but the cycle will be broken when
+    the timer completes, automatically cleaning up the wxFutureCall
+    object.
+    """
+    def __init__(self, millis, callable, *args, **kwargs):
+        self.millis = millis
+        self.callable = callable
+        self.SetArgs(*args, **kwargs)
+        self.runCount = 0
+        self.hasRun = False
+        self.result = None
+        self.timer = None
+        self.Start()
+
+    def __del__(self):
+        self.Stop()
+
+
+    def Start(self, millis=None):
+        """
+        (Re)start the timer
+        """
+        self.hasRun = False
+        if millis is not None:
+            self.millis = millis
+        self.Stop()
+        self.timer = wxPyTimer(self.Notify)
+        self.timer.Start(self.millis, wxTIMER_ONE_SHOT)
+    Restart = Start
+
+
+    def Stop(self):
+        """
+        Stop and destroy the timer.
+        """
+        if self.timer is not None:
+            self.timer.Stop()
+            self.timer = None
+
+
+    def GetInterval(self):
+        if self.timer is not None:
+            return self.timer.GetInterval()
+        else:
+            return 0
+
+
+    def IsRunning(self):
+        return self.timer is not None and self.timer.IsRunning()
+
+
+    def SetArgs(self, *args, **kwargs):
+        """
+        (Re)set the args passed to the callable object.  This is
+        useful in conjunction with Restart if you want to schedule a
+        new call to the same callable object but with different
+        parameters.
+        """
+        self.args = args
+        self.kwargs = kwargs
+
+    def HasRun(self):
+        return self.hasRun
+
+    def GetResult(self):
+        return self.result
+
+    def Notify(self):
+        """
+        The timer has expired so call the callable.
+        """
+        if self.callable and getattr(self.callable, 'im_self', True):
+            self.runCount += 1
+            self.result = self.callable(*self.args, **self.kwargs)
+        self.hasRun = True
+        wxCallAfter(self.Stop)
+
 
 #----------------------------------------------------------------------
 
@@ -1822,6 +1911,18 @@ class wxApp(wxPyApp):
 
     def __init__(self, redirect=_defRedirect, filename=None, useBestVisual=False):
         wxPyApp.__init__(self)
+
+        if wx.wxPlatform == "__WXMAC__":
+            try:
+                import MacOS
+                if not MacOS.WMAvailable():
+                    print """This program needs access to the screen. Please run with
+'pythonw', not 'python', and only when you are logged in on the main display
+of your Mac."""
+                    sys.exit(1)
+            except:
+                pass
+
         self.stdioWin = None
         self.saveStdio = (sys.stdout, sys.stderr)