最近在mac下安裝mysqldb－python搞的好麻煩，爲了避免這個坑，先記下來再講！
首先重啓mac，長按cmd＋R，進入恢復模式，然後依次點擊應用－》終端，然後輸入csrutil disable,究其原因，是因爲某些庫文件mac爲了安全不讓寫入，所以，必須把安全模式關閉；然後啓動mac；
然後
>>> import MySQLdb
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "build/bdist.macosx-10.11-intel/egg/MySQLdb/__init__.py", line 19, in <module>
File "build/bdist.macosx-10.11-intel/egg/_mysql.py", line 7, in <module>
File "build/bdist.macosx-10.11-intel/egg/_mysql.py", line 6, in __bootstrap__
ImportError: dlopen(/Users/zhao/.python-eggs/MySQL_python-1.2.5-py2.7-macosx-10.11-intel.egg-tmp/_mysql.so, 2): Library not loaded: libmysqlclient.18.dylib
unsafe referenced from: /Users/zhao/.python-eggs/MySQL_python-1.2.5-py2.7-macosx-10.11-intel.egg-tmp/_mysql.so這個問題就解決了，然後再執行import MySQLdb
還是會報錯，
ImportError: dlopen(/Users/zhao/.python-eggs/MySQL_python-1.2.5-py2.7-macosx-10.11-intel.egg-tmp/_mysql.so, 2): Library not loaded: libmysqlclient.18.dylib
Referenced from: /Users/zhao/.python-eggs/MySQL_python-1.2.5-py2.7-macosx-10.11-intel.egg-tmp/_mysql.so
Reason: image not found
3.這時候再執行ln -s /usr/local/mysql/lib/libmysqlclient.18.dylib /usr/lib/libmysqlclient.18.dylib
最終這個問題終於解決了