diff --git a/include/wx/osx/core/evtloop.h b/include/wx/osx/core/evtloop.h
index 2b002e087d..fc8c76d095 100644
--- a/include/wx/osx/core/evtloop.h
+++ b/include/wx/osx/core/evtloop.h
@@ -55,6 +55,10 @@ protected:
     // terminating when Exit() is called
     virtual int DoRun();
 
+    // may be overridden to perform some action at the start of each new event
+    // loop iteration
+    virtual void OnNextIteration() {}
+
     virtual void DoYieldFor(long eventsToProcess);
 
     void CommonModeObserverCallBack(CFRunLoopObserverRef observer, int activity);
diff --git a/src/osx/core/evtloop_cf.cpp b/src/osx/core/evtloop_cf.cpp
index de0bf39074..f24744c95c 100644
--- a/src/osx/core/evtloop_cf.cpp
+++ b/src/osx/core/evtloop_cf.cpp
@@ -272,6 +272,8 @@ void wxCFEventLoop::OSXDoRun()
 {
     for ( ;; )
     {
+        OnNextIteration();
+
         // generate and process idle events for as long as we don't
         // have anything else to do
         DoProcessEvents();