The 2.1.1 version of Maltego CaseFile for Mac is provided as a free download on our website. The application is included in Business Tools. The actual developer of this free Mac application is Paterva.
From the developer:
CaseFile is the younger brother to Maltego. It is essentially the same graphing application as Maltego without the ability to run transforms. The program gives you the ability to quickly add, link and analyze data. The app targets a unique market of 'offline' analysts whose primary sources of information are not gained from the open-source intelligence side or can be programmatically queried.
You may want to check out more software for Mac, such as Mystery Case Files - Return To Ravenhearst, Mystery Case Files - Dire Grove or Mystery Case Files: Prime Suspects, which might be related to Maltego CaseFile.