diff --git a/checkin_notes b/checkin_notes
index 51879e38bc..941288fe7a 100644
--- a/checkin_notes
+++ b/checkin_notes
@@ -7700,3 +7700,9 @@ David  23 Oct 2011
         Not sure why that was in there.
     html/inc/
         forum_rss.inc
+
+Charlie 24 Oct 2011
+    - Mac installer: Fix a very old bug.
+
+    mac_build/
+        Mac_SA_Secure.sh
diff --git a/mac_build/Mac_SA_Secure.sh b/mac_build/Mac_SA_Secure.sh
index aa67bfed13..eb4d62f6bd 100755
--- a/mac_build/Mac_SA_Secure.sh
+++ b/mac_build/Mac_SA_Secure.sh
@@ -63,7 +63,7 @@
 # 
 
 # Updated 1/28/10 for BOINC version 6.8.20, 6.10.30 and 6.11.1
-# Last updated 8/12/11 for OS 10.7 Lion
+# Last updated 10/24/11 for OS 10.7.2 Lion
 # WARNING: do not use this script with versions of BOINC older 
 # than 6.8.20 and 6.10.30
 
@@ -97,7 +97,7 @@ function make_boinc_user() {
             # uid=gid already in use, so find an unused user ID
             uid="25"
             while true; do
-                name=$(dscl . search /groups UniqueID $uid | cut -f1 -s)
+                name=$(dscl . search /users UniqueID $uid | cut -f1 -s)
                 if [ -z "$name" ] ; then
                     break
                 fi