How to fix error caused by libmysqlclient.15.dylib not being loaded?

问题

I've upgraded to Rails 2.2.2 and installed the MySQL 2.7 gem and am seeing this error when I try to run a migration or start the server:

dlopen(/Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle, 9): Library not loaded: /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib
Referenced from: /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle
Reason: image not found - /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle

What's the fix?

回答1:

I had to remove the directory from the old references:

sudo install_name_tool -change libmysqlclient.18.dylib
    /usr/local/mysql/lib/libmysqlclient.18.dylib
    /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle

sudo install_name_tool -change libmysqlclient.18.dylib 
    /usr/local/mysql/lib/libmysqlclient.18.dylib
    /Library/Ruby/Gems/1.8/gems/mysql-2.7/mysql.bundle

回答2:

Answering my own question for the benefit of others.

I found the fix here.

Run:

sudo install_name_tool -change /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle
sudo install_name_tool -change /usr/local/mysql/lib/mysql/libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib /Library/Ruby/Gems/1.8/gems/mysql-2.7/mysql.bundle

Worked for me.

回答3:

Using sudo can often lead to unexpected issues. What worked for me was uninstalling the mysql2 gem and reinstalling it.

gem uninstall mysql2 bundle

回答4:

If Gabe Hollombe solution doesn't works then try this

sudo install_name_tool -change libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib /Library/Ruby/Gems/1.8/gems/mysql-2.7/lib/mysql.bundle

sudo install_name_tool -change libmysqlclient.15.dylib /usr/local/mysql/lib/libmysqlclient.15.dylib /Library/Ruby/Gems/1.8/gems/mysql-2.7/mysql.bundle

来源：https://stackoverflow.com/questions/517976/how-to-fix-error-caused-by-libmysqlclient-15-dylib-not-being-loaded