1、安装memcached
brew install memcached
2、安装libmemcached
brew install libmemcached
3、安装memcached php扩展
wget http://memcached.org/latest
tar zxvf latest
cd memcached-2.2.0
sudo ./configure --with-php-config=/usr/local/php/bin/php-config --with-libmemcached-dir=/usr/local/Cellar/libmemcached/1.0.18 --enable-memcached
sudo make && make install
原文：http://my.oschina.net/phper1234/blog/517696