If you are using Iguana on a 64-bit Mac OS X, Iguana will not be able to communicate with any locally installed 64-bit version of MySQL. This is because Iguana for the Mac is a 32-bit package.

To be able to use Iguana with MySQL on the Mac, you must install the 32-bit version of MySQL and tell Iguana that this is the MySQL library that you want to use. To do this:

• Download the 32-bit MySQL Mac OS X distribution.
• Unpack this distribution and copy the lib directory to <mysql>/lib32 (where <mysql> is the directory in which MySQL has been installed).
• In Iguana, click the Settings tab.
• Click Database Settings. A table of available database APIs appears:

• Click the Edit button in the MySQL row of the table, then follow the steps described in Changing the Shared Library. Browse for the location of the 32-bit MySQL shared library that you have just installed (for example, /usr/local/mysql/lib32/libmysqlclient.dylib).

After you have specified the location of your 32-bit MySQL shared library, Iguana will be able to use this library without any difficulties.