diff --git a/checkin_notes b/checkin_notes
index 7d9c28fc36..e5b643585e 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -8334,8 +8334,14 @@ Charlie 4 Sep 2007
 Charlie 5 Sep 2007
     - Mac SCR: Do screen blanking in screensaver since CC no longer does it.
     - Fix a compiler warning.
+    - Mac Installer: remove boinc.tiff from screensaver because newer ones 
+        have boinc.jpg instead; touch new manager and screensaver to alert 
+        system that they have new version numbers.
     
     clientscr/
         mac_saver_module.cpp
     lib/
         util.C,h
+    mac_installer/
+        postinstall
+        postupgrade
diff --git a/mac_installer/postinstall b/mac_installer/postinstall
index d3e6780446..3b81a2bb44 100644
--- a/mac_installer/postinstall
+++ b/mac_installer/postinstall
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 ##
-# post-Install Script for Macintosh BOINC Manager for OS X revised 7/11/07
+# post-Install Script for Macintosh BOINC Manager for OS X revised 9/5/07
 ##
 
 echo "initial directory = $PWD"
@@ -11,9 +11,17 @@ cd "$1"
 
 echo "new directory = $PWD"
 
+# Remove boinc.tiff from screensaver if present because it conflicts with new boinc.jpg
+rm -f "/Library/Screen Savers/BOINCSaver.saver/Contents/Resources/boinc.tiff"
+
 # Run the Postinstall Application
 Contents/Resources/PostInstall.app/Contents/MacOS/PostInstall -part1
 
+# Touch the newly installed bundles so OS recognizes new version numbers
+touch "/Applications/BOINCManager.app"
+touch "/Library/Screen Savers/BOINCSaver.saver"
+
+# Start BOINC
 Contents/Resources/PostInstall.app/Contents/MacOS/PostInstall -part2 &
 
 exit 0
diff --git a/mac_installer/postupgrade b/mac_installer/postupgrade
index 71badac989..9f7dc45c03 100755
--- a/mac_installer/postupgrade
+++ b/mac_installer/postupgrade
@@ -1,7 +1,7 @@
 #!/bin/sh
 
 ##
-# post-Upgrade Script for Macintosh BOINC Manager for OS X revised 7/11/07
+# post-Upgrade Script for Macintosh BOINC Manager for OS X revised 9/5/07
 ##
 
 echo "initial directory = $PWD"
@@ -11,9 +11,17 @@ cd "$1"
 
 echo "new directory = $PWD"
 
+# Remove boinc.tiff from screensaver if present because it conflicts with new boinc.jpg
+rm -f "/Library/Screen Savers/BOINCSaver.saver/Contents/Resources/boinc.tiff"
+
 # Run the Postinstall Application
 Contents/Resources/PostInstall.app/Contents/MacOS/PostInstall -part1
 
+# Touch the newly installed bundles so OS recognizes new version numbers
+touch "/Applications/BOINCManager.app"
+touch "/Library/Screen Savers/BOINCSaver.saver"
+
+# Start BOINC
 Contents/Resources/PostInstall.app/Contents/MacOS/PostInstall -part2 &
 
 exit 0