转自：
http://errorlog.lofter.com/post/1cb97859_7d3be93
升级osx 10.11 python mysqldb
错误信息
ImportError: dlopen(/Library/Python/2.7/site-packages/MySQL_python-1.2.4b4-py2.7-macosx-10.9-intel.egg/_mysql.so, 2): Library not loaded: libmysqlclient.18.dylib
Referenced from: /Library/Python/2.7/site-packages/MySQL_python-1.2.4b4-py2.7-macosx-10.9-intel.egg/_mysql.so
Reason: unsafe use of relative rpath libmysqlclient.18.dylib in /Library/Python/2.7/site-packages/MySQL_python-1.2.4b4-py2.7-macosx-10.9-intel.egg/_mysql.so with restricted binary
原因：
The computer security settings prevent the shared library _mysql.so from using a relative reference to the library libmysqlclient.18.dylib. In the future, the shared library _mysql.so may be updated. Until then, you can force it to use an absolute reference via the install_name_toolutility. Assuming that libmysqlclient.18.dylib is in /usr/local/mysql/lib/, then run the command:
解决方法：
sudo install_name_tool -change libmysqlclient.18.dylib
/usr/local/mysql/lib/libmysqlclient.18.dylib
/Library/Python/2.7/site-packages/MySQL_python-1.2.4b4-py2.7-macosx-10.9-intel.egg/_mysql.so