diff --git a/README.md b/README.md
index 04bcd66..2201b4e 100644
--- a/README.md
+++ b/README.md
@@ -4,14 +4,10 @@
 
 点击下载---->>>>>>><a href="https://github.com/guoruibiao/crosswall/raw/master/crowall.exe"><img src="https://github.com/guoruibiao/crosswall/raw/master/downloadicon.png"></a> 
 
-更多细节，可以参考下面的文章链接 http://blog.csdn.net/marksinoberg/article/details/52934770
-
+更多细节，可以参考下面的文章链接 http://blog.csdn.net/marksinoberg/article/details/52943194
 ---
 
-![Google](https://camo.githubusercontent.com/6f787bdcb60b630c8cb9dd463ffe73b3bcacba70/68747470733a2f2f7777772e676f6f676c652e636f6d2f6c6f676f732f646f6f646c65732f323031362f676f6f676c65732d313874682d62697274686461792d353636313533353637393534353334342d687032782e676966)
-
-
-先说说这个小工具的原理吧，就是替换hosts文件。然后其依赖于GitHub上一个维护小组（https://github.com/racaljk/hosts）的hosts更新文件。
+先说说这个小工具的原理吧，就是替换hosts文件。然后其依赖于GitHub上一个维护小组（  https://github.com/racaljk/hosts  ）的hosts更新文件。
 
 然后这个工具在每次运行的时候，都会自动的下载最新的hosts文件，并在备份当前的hosts文件为hosts_bak后自动的完成替换工作。
 
diff --git a/crowall.py b/crowall.py
index 2354a1c..93505f7 100644
--- a/crowall.py
+++ b/crowall.py
@@ -28,11 +28,16 @@ def crosswall(systemtype='Window'):
             os.system('pause')
             print 'It\'s done on Windows! And Try your browser!'
         elif systemtype == "Linux":
-            os.system('cp /etc/hosts /etc/hosts_bak')
+            os.system('cp /etc/hosts.txt /etc/hosts_bak')
             os.system('mv ./hosts /etc/hosts')
             os.system('pause')
             os.system('sudo /etc/init.d/networking restart ')
             print 'It\'s done on Linux! And Try your browser!'
+        elif systemtype == "Darwin":
+            os.system('sudo cp /etc/hosts /etc/host_bak')
+            os.system('sudo mv ./hosts.txt /etc/hosts')
+            os.system('sudo ifconfig en0 down && sudo ifconfig en0 up')
+            print 'It\'s done on Mac! And Try your browser!'
     except Exception as e:
         print e
 
@@ -40,7 +45,7 @@ def crosswall(systemtype='Window'):
 
 if __name__ == '__main__':
 
-    url = 'https://raw.githubusercontent.com/racaljk/hosts/master/hosts'
+    url = 'https://raw.githubusercontent.com/googlehosts/hosts/master/hosts-files/hosts'
     downloadHosts(url=url)
     print 'Hosts update success!'
     crosswall(platform.system())