diff --git a/Demos/README.md b/Demos/README.md
index 6cb6944b5..0920b5a4d 100644
--- a/Demos/README.md
+++ b/Demos/README.md
@@ -7,4 +7,23 @@ python 简单图像处理 series, ￥lan￥
 http://www.cnblogs.com/xianglan/archive/2010/12/25/1916953.html
 
 PIL 学习笔记 series, Neil Chen
-http://www.cnblogs.com/RChen/archive/2007/03/31/pil_1.html
\ No newline at end of file
+http://www.cnblogs.com/RChen/archive/2007/03/31/pil_1.html
+
+
+## Build it on Mac OS X 10.6.8
+
+Build an egg for i386 with Python 2.5/Python 2.6
+
+    export ARCHFLAGS="-arch i386"
+    export CC="/usr/bin/gcc-4.0 -arch i386"
+
+    python2.5 setup.py bdist_egg
+    python2.6 setup.py bdist_egg
+
+Build an egg for x86_64 with Python 2.7(install it via MacPorts)
+
+    python setup.py bdist_egg
+
+## Install it via Package Mangement System
+
+HomeBrew is cool, you could use it instaed of MacPorts on OS X.