Unfortunately, HeidiSQL does not have a version for Mac OS X, but not for long. Now there is jHeidi, and alternative to HeidiSQL developed in Java that aims to bring Mac OS X almost all of the features available in Windows.
Some features in jHeidi which are also found in HeidiSQL are:
-Create, update, delete database tables, feilds, or indexes.
-Window for interactive SQL queries.
-Browser support for MySQL.
-Management of the connection profile.
-Export to CVS, HTML, and XML.
It Requires Java 1.5