diff --git a/checkin_notes b/checkin_notes
index 963019252d..f5ab5e90f4 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -9702,3 +9702,10 @@ Bruce 29 July 2005
     sched/
         sched_send.C
 
+Charlie 29 July 2005
+    Mac: #define __WXDEBUG__ only in our code (not in wxWidgets headers) 
+    in Development version only to allow testing of wizard.  See comments
+    in MacGUI.pch for details.
+    
+        mac/
+            MacGUI.pch
diff --git a/clientgui/mac/MacGUI.pch b/clientgui/mac/MacGUI.pch
index 7b4680fc49..36b31cddc4 100644
--- a/clientgui/mac/MacGUI.pch
+++ b/clientgui/mac/MacGUI.pch
@@ -34,4 +34,25 @@
 
 #include "config.h"
 
+// We want to define __WXDEBUG__ to enable certain test code within our project, 
+// but only for Development builds.  Unfortunately, XCode allows us to modify 
+// compiler or linker flags by build style only on a project-wide basis.  If we 
+// do that, then the compiler & linker flags override these settings for all 
+// targets in the project.  But our different targets need different settings.
+// XCode  does not provide any way to do this on a per-target basis. 
+// This means that we can neither add -D__WXDEBUG to the compiler flags for only 
+// Development Builds of the BOINC Manager, but we also cannot link in the debug 
+// build of wxWidgets for only Development Builds of the BOINC Manager.
+// So we use a couple of ugly hacks here:
+// (1) We take advantage that __OPTIMIZE__ is defined only for Deployment builds.
+// (2) We define __WXDEBUG__ AFTER including stdwx.h, so as not to require the 
+//     debug build of the wxWidgets  library.
+
+// __OPTIMIZE__ is defined in Deployment builds, not in Development builds
+#ifndef __OPTIMIZE__
+// Define this AFTER including stdwx.h so we don't have to link wih debug Wx libs
+#define __WXDEBUG__
+#endif
+
+
 #endif