diff --git a/Deploy/jsminify.sh b/Deploy/jsminify.sh
index f89bdfee1..fde2e8274 100755
--- a/Deploy/jsminify.sh
+++ b/Deploy/jsminify.sh
@@ -20,6 +20,12 @@ do
     fi
 done
 
+# If you want run this script on Mac OS X,
+# I suggest you install gnu-sed (whth --with-default-names option).
+# $ brew install gnu-sed --with-default-names
+# Reference:
+# http://stackoverflow.com/a/27834828/3167471
+
 #remove space
 echo "Remove space.."
 sed 's/ \+/ /g' -i /tmp/harbor.app.temp.js