diff --git a/src/packaging/MacOS/InstallationCheck.13 b/src/packaging/MacOS/InstallationCheck.13
new file mode 100644
index 0000000000..accb253b91
--- /dev/null
+++ b/src/packaging/MacOS/InstallationCheck.13
@@ -0,0 +1,19 @@
+#!/bin/sh
+majorvers=`uname -r | sed 's/\..*//'`
+if [ $majorvers -ne 13 ]; then
+	exit 112
+fi
+
+# check for temporary versions of ThisCell and CellAlias
+# and move them aside
+tmpthiscell=/private/tmp/org.OpenAFS.Install.ThisCell.$USER
+tmpcellalias=/private/tmp/org.OpenAFS.Install.CellAlias.$USER
+date=`date +%Y%m%d%H%M`
+if [ -e $tmpthiscell ]; then
+    mv -f $tmpthiscell $tmpthiscell.$date
+fi
+if [ -e $tmpcellalias ]; then
+    mv -f $tmpcellalias $tmpcellalias.$date
+fi
+
+exit 0
diff --git a/src/packaging/MacOS/InstallationCheck.strings.13 b/src/packaging/MacOS/InstallationCheck.strings.13
new file mode 100644
index 0000000000..26b9e8f337
--- /dev/null
+++ b/src/packaging/MacOS/InstallationCheck.strings.13
@@ -0,0 +1 @@
+"16" = "This OpenAFS release requires Mountain Lion (10.9)";
diff --git a/src/packaging/MacOS/ReadMe.rtf.13 b/src/packaging/MacOS/ReadMe.rtf.13
new file mode 100644
index 0000000000..fadf33f22e
--- /dev/null
+++ b/src/packaging/MacOS/ReadMe.rtf.13
@@ -0,0 +1,7 @@
+{\rtf1\ansi\ansicpg1252\cocoartf1038\cocoasubrtf320
+{\fonttbl\f0\fswiss\fcharset0 Helvetica;}
+{\colortbl;\red255\green255\blue255;}
+\margl1440\margr1440\vieww9000\viewh9000\viewkind0
+\pard\tx1440\tx2880\tx4320\tx5760\tx7200\ql\qnatural
+
+\f0\fs24 \cf0 This release of OpenAFS is targeted at MacOS 10.9 (Mavericks) and is not recommended for use with any other version.}
diff --git a/src/packaging/MacOS/buildpkg.sh.in b/src/packaging/MacOS/buildpkg.sh.in
index ca20c813db..56b9923582 100644
--- a/src/packaging/MacOS/buildpkg.sh.in
+++ b/src/packaging/MacOS/buildpkg.sh.in
@@ -43,6 +43,9 @@ fi
 if [ $majorvers -eq 12 ]; then
   RELNAME="MountainLion"
 fi
+if [ $majorvers -eq 13 ]; then
+  RELNAME="Mavericks"
+fi
 
 PKGROOT=$CURDIR/pkgroot
 PKGRES=$CURDIR/pkgres