diff --git a/checkin_notes b/checkin_notes
index 65a2e33cc6..55beb190d1 100755
--- a/checkin_notes
+++ b/checkin_notes
@@ -6099,3 +6099,9 @@ Rom    16 June 2006 (HEAD)
     - Tag for 5.5.1 release, all platforms
       boinc_core_release_5_5_1
 
+Charlie 15 June 2006
+    - Mac sandbox: fix errors in SetupSecurity()
+
+    clientgui/
+        mac/
+            SetupSecurity.cpp
diff --git a/clientgui/mac/SetupSecurity.cpp b/clientgui/mac/SetupSecurity.cpp
index 7d8f0a204b..dd369b370b 100644
--- a/clientgui/mac/SetupSecurity.cpp
+++ b/clientgui/mac/SetupSecurity.cpp
@@ -271,7 +271,7 @@ int SetBOINCDataOwnersGroupsAndPermissions() {
     result = FSPathMakeRef((StringPtr)fullpath, &ref, &isDirectory);
     if ((result == noErr) && (isDirectory)) {
         // Set owner and group of projects directory's contents
-        sprintf(buf1, "%s:%s", boinc_master_user_name, boinc_master_group_name);
+        sprintf(buf1, "%s:%s", boinc_master_user_name, boinc_project_name);
         // chown boinc_master:boinc_project "/Library/Applications/BOINC Data/projects"
         err = DoPrivilegedExec(chownPath, "-R", buf1, fullpath, NULL, NULL);
         if (err)
@@ -300,7 +300,7 @@ int SetBOINCDataOwnersGroupsAndPermissions() {
     result = FSPathMakeRef((StringPtr)fullpath, &ref, &isDirectory);
     if ((result == noErr) && (isDirectory)) {
         // Set owner and group of slots directory's contents
-        sprintf(buf1, "%s:%s", boinc_master_user_name, boinc_master_group_name);
+        sprintf(buf1, "%s:%s", boinc_master_user_name, boinc_project_name);
         // chown boinc_master:boinc_project "/Library/Applications/BOINC Data/slots"
         err = DoPrivilegedExec(chownPath, "-R", buf1, fullpath, NULL, NULL);
         if (err)
diff --git a/mac_build/English.lproj/InfoPlist.strings b/mac_build/English.lproj/InfoPlist.strings
index c56a3a5b9e..27083651bc 100755
--- a/mac_build/English.lproj/InfoPlist.strings
+++ b/mac_build/English.lproj/InfoPlist.strings
@@ -1,5 +1,5 @@
 /* Localized versions of Info.plist keys */
 
 CFBundleName = "BOINC";
-CFBundleShortVersionString = "BOINC version 5.5.0";
-CFBundleGetInfoString = "BOINC version 5.5.0, Copyright 2005 University of California.";
+CFBundleShortVersionString = "BOINC version 5.5.1";
+CFBundleGetInfoString = "BOINC version 5.5.1, Copyright 2006 University of California.";
diff --git a/mac_build/Info.plist b/mac_build/Info.plist
index 4ea7f15013..2e6386cb6a 100644
--- a/mac_build/Info.plist
+++ b/mac_build/Info.plist
@@ -17,6 +17,6 @@
 	<key>CFBundleSignature</key>
 	<string>BNC!</string>
 	<key>CFBundleVersion</key>
-	<string>5.5.0</string>
+	<string>5.5.1</string>
 </dict>
 </plist>
diff --git a/mac_build/Installer-Info.plist b/mac_build/Installer-Info.plist
index 5537c9d95d..65733f2f44 100644
--- a/mac_build/Installer-Info.plist
+++ b/mac_build/Installer-Info.plist
@@ -15,6 +15,6 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>5.5.0</string>
+	<string>5.5.1</string>
 </dict>
 </plist>
diff --git a/mac_build/ScreenSaver-Info.plist b/mac_build/ScreenSaver-Info.plist
index 049ba2e656..248f9f6852 100644
--- a/mac_build/ScreenSaver-Info.plist
+++ b/mac_build/ScreenSaver-Info.plist
@@ -17,7 +17,7 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>5.5.0</string>
+	<string>5.5.1</string>
 	<key>NSPrincipalClass</key>
 	<string>BOINC_Saver_ModuleView</string>
 </dict>
diff --git a/mac_build/SystemMenu-Info.plist b/mac_build/SystemMenu-Info.plist
index 8e7a308cd0..7f7b83ef66 100644
--- a/mac_build/SystemMenu-Info.plist
+++ b/mac_build/SystemMenu-Info.plist
@@ -15,6 +15,6 @@
 	<key>CFBundleSignature</key>
 	<string>????</string>
 	<key>CFBundleVersion</key>
-	<string>5.5.0</string>
+	<string>5.5.1</string>
 </dict>
 </plist>