--- bin/mod9.10	2011-09-28 18:33:50.000000000 -0700
+++ bin/mod9.10	2011-10-13 14:47:04.000000000 -0700
@@ -29,5 +29,14 @@
 # (ask your sysadmin to increase the hard limit if this is not enough)
 ulimit -S -s `ulimit -H -s`
 
+# Disable 64-bit support if running on a Mac OS X Leopard (10.5) machine;
+# Snow Leopard (10.6) is needed for 64-bit support.
+if test "${EXECUTABLE_TYPE}" = "mac10v4"; then
+  VERSION=`sw_vers -productVersion|cut -d. -f 1-2`
+  if test "${VERSION}" = "10.5"; then
+    NICE="${NICE} arch -i386"
+  fi
+fi
+
 # run the program:
 exec $NICE ${MODINSTALL9v10}/bin/${EXECUTABLE} $*