diff --git a/gui/auxFrame.py b/gui/auxFrame.py
index b0709fd6e..30237cfac 100644
--- a/gui/auxFrame.py
+++ b/gui/auxFrame.py
@@ -42,9 +42,11 @@ class AuxiliaryFrame(wx.Frame):
         if name is not None:
             kwargs['name'] = name
         super().__init__(**kwargs)
-        # Intercept copy-paste actions and do nothing in secondary windows
-        self.Bind(wx.EVT_MENU, self.OnSuppressedAction, id=wx.ID_COPY)
-        self.Bind(wx.EVT_MENU, self.OnSuppressedAction, id=wx.ID_PASTE)
+        # Intercept copy-paste actions and do nothing in secondary windows,
+        # otherwise on Mac OS X Cmd-C brings up copy fit dialog
+        if 'wxMac' in wx.PlatformInfo:
+            self.Bind(wx.EVT_MENU, self.OnSuppressedAction, id=wx.ID_COPY)
+            self.Bind(wx.EVT_MENU, self.OnSuppressedAction, id=wx.ID_PASTE)
         if 'wxMSW' in wx.PlatformInfo:
             self.SetBackgroundColour(wx.SystemSettings.GetColour(wx.SYS_COLOUR_BTNFACE))