diff --git a/checkin_notes b/checkin_notes
index f8c9297bb2..b08e3d74aa 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -6216,3 +6216,10 @@ Charlie 23 Aug 2010
         BOINCClientManager.cpp
         BOINCGUIApp.cpp
         MainDocument.cpp
+
+Charlie 26 Aug 2010
+    - MGR: On Mac only, Close Window menu item (or its shortcut Command-w) 
+        closes the Event Log if it is the front window.
+
+    clientgui/
+        BOINCBaseFrame.cpp
diff --git a/clientgui/BOINCBaseFrame.cpp b/clientgui/BOINCBaseFrame.cpp
index 9d68afd3d0..714997b1e3 100644
--- a/clientgui/BOINCBaseFrame.cpp
+++ b/clientgui/BOINCBaseFrame.cpp
@@ -320,6 +320,23 @@ void CBOINCBaseFrame::OnClose(wxCloseEvent& event) {
 void CBOINCBaseFrame::OnCloseWindow(wxCommandEvent& WXUNUSED(event)) {
     wxLogTrace(wxT("Function Start/End"), wxT("CBOINCBaseFrame::OnCloseWindow - Function Begin"));
 
+#ifdef __WXMAC__
+    CFStringRef frontWindowTitle, eventLogTitle;
+    CDlgEventLog* eventLog = wxGetApp().GetEventLog();
+    if (eventLog) {
+        WindowRef win = FrontNonFloatingWindow();
+        if (win) {
+            CopyWindowTitleAsCFString(win, &frontWindowTitle);
+            eventLogTitle = CFStringCreateWithCString(NULL, eventLog->GetTitle().char_str(), kCFStringEncodingUTF8);
+            if (CFStringCompare(eventLogTitle, frontWindowTitle, 0) == kCFCompareEqualTo) {
+                wxCloseEvent eventClose;
+                eventLog->OnClose(eventClose);
+                return;
+            }
+        }
+    }
+#endif
+
 	Close();
 
 	wxLogTrace(wxT("Function Start/End"), wxT("CBOINCBaseFrame::OnCloseWindow - Function End"));