Downloading Maltego XL 4.3.0 for Mac from the developer's website was possible when we last checked. We cannot confirm if there is a free download of this app available. The software lies within Developer Tools, more precisely DB Tools.
This software for Mac OS X was originally created by Paterva PTY Limited. According to the results of the Google Safe Browsing check, the developer's site is safe. Despite this, we recommend checking the downloaded files with any free antivirus software.
From the developer:
Maltego XL (eXtra Large) is the premier edition of the three Maltego clients, it includes all the capabilities and features of Maltego Classic but with the enhanced capability of working with extremely large graphs. Just like with Maltego Classic, Maltego XL will allow you to map out a clear threat picture of your entire network making it easy to identify its weak points and abnormalities.
You may want to check out more Mac applications, such as Maltego Classic, DBF to XLS Converter or d2x-xl, which might be related to Maltego XL.
Database Tools
Project Management