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MySQL Improperly Configured: Addressing the "unsafe use of relative path" Error
When running Python's manage.py runserver with Django, you may encounter the infamous error:
"ImproperlyConfigured: Error loading MySQLdb module: dlopen([path to _mysql.so], 2): Library not loaded: libmysqlclient.18.dylib Reason: unsafe use of relative rpath libmysqlclient.18.dylib in [_mysql.so] with restricted binary"
Cause:
In macOS El Capitan (10.11), Apple introduced System Integrity Protection, which restricts protected programs like MySQL from calling shared libraries with relative references to other libraries. This is an issue because _mysql.so, a shared library required by MySQLdb, contains a relative reference to libmysqlclient.18.dylib.
Solution:
Until the library is updated, you can force it to use an absolute reference using the install_name_tool utility:
sudo install_name_tool -change libmysqlclient.18.dylib \ /usr/local/mysql/lib/libmysqlclient.18.dylib \ /Library/Python/2.7/site-packages/_mysql.so
Example:
Assuming libmysqlclient.18.dylib is located at /Users/Applications/My_Applications/MySQL/lib/, the command would be:
sudo install_name_tool -change libmysqlclient.18.dylib \ /Users/Applications/My_Applications/MySQL/lib/libmysqlclient.18.dylib \ /Library/Python/2.7/site-packages/_mysql.so
Note:
This solution may not work until you update to a newer version of MySQL that supports macOS El Capitan's security measures.
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