You could have downloaded Navtones 1.0 for Mac from our software library for free. The software lies within System Tools, more precisely Device Assistants. This free software for Mac OS X is an intellectual property of Wanderlust Media, LLC.
From the developer:
Navtones is a free application that allows you to manage your Tom Tom device. With this application you can verify your device code and show it to you. The application you has an easy to use user friendly interface. The user uses it at his/her own risk.
You may want to check out more Mac applications, such as toDoo, NWD-211AN Utility or BESAgent, which might be similar to Navtones.