错误提示：
ImportError: dlopen(/Users/XXX/.python-eggs/MySQL_python-1.2.5-py2.7-macosx-10.9-intel.egg-tmp/_mysql.so,
2): Library not loaded: /usr/local/lib/libmysqlclient.18.dylib
Referenced from: /Users/XXX/.python-eggs/MySQL_python-1.2.5-py2.7-macosx-10.9-intel.egg-tmp/_mysql.so
根据提示知道 在本地找不到/usr/local/lib/libmysqlclient.18.dylib文件，通过
find / -name 'libmysqlclient.18.dylib' 查找，
可以看到/usr/local/mysql-5.6.17-osx10.7-x86_64/lib/libmysqlclient.18.dylib有这个文件，
通过软连接
ln -s /usr/local/mysql-5.6.17-osx10.7-x86_64/lib/libmysqlclient.18.dylib /usr/local/lib/libmysqlclient.18.dylib
问题解决
