diff --git a/mac_installer/postinstall b/mac_installer/postinstall
index 3903597156..996a3ad4c5 100644
--- a/mac_installer/postinstall
+++ b/mac_installer/postinstall
@@ -9,3 +9,5 @@ chmod -R a+s /Applications/BOINCManager.app
 cd "$1"
 # Run the Postinstall Application
 Contents/Resources/PostInstall.app/Contents/MacOS/PostInstall &
+
+exit 0
diff --git a/mac_installer/postupgrade b/mac_installer/postupgrade
index 08d1908581..d8970ebfd7 100755
--- a/mac_installer/postupgrade
+++ b/mac_installer/postupgrade
@@ -9,3 +9,5 @@ chmod -R a+s /Applications/BOINCManager.app
 cd "$1"
 # Run the Postinstall Application
 Contents/Resources/PostInstall.app/Contents/MacOS/PostInstall &
+
+exit 0