diff --git a/readme.md b/readme.md
index 9360894..4dd1890 100644
--- a/readme.md
+++ b/readme.md
@@ -3,4 +3,8 @@
 ---
 
 
-https://github.com/g3n/engine
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+> https://github.com/g3n/engine
+>
+#### mac
+
+    brew install libvorbis openal-soft
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