diff --git a/Notify_macosx.md b/Notify_macosx.md
index 3f94cde..afa8192 100644
--- a/Notify_macosx.md
+++ b/Notify_macosx.md
@@ -6,6 +6,11 @@
 
 Display notifications right on your Mac OS X desktop provided you're running version 10.8 or higher and have installed [terminal-notifier](https://github.com/julienXX/terminal-notifier).  This only works if you're sending the notification to the same system you're currently accessing.  Hence this notification can not be sent from one PC to another.
 
+```bash
+# Make sure terminal-notifier is installed into your system
+brew install terminal-notifier
+```
+
 ### Syntax
 There are currently no options you can specify for this kind of notification, so it's really easy to reference:
 * `macosx://`