Native control on Mac draws its own arrows, so don't draw them ourselves in that case.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@43733 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

wxPython/wx/lib/mixins/listctrl.py

@@ -117,7 +117,8 @@ class ColumnSorterMixin:
         self._col = col = evt.GetColumn()
         self._colSortFlag[col] = int(not self._colSortFlag[col])
         self.GetListCtrl().SortItems(self.GetColumnSorter())
-        self.__updateImages(oldCol)
+        if wx.Platform != "__WXMAC__" or wx.SystemOptions.GetOptionInt("mac.listctrl.always_use_generic") == 1:
+            self.__updateImages(oldCol)
         evt.Skip()