The 1.6.7 version of GeoDa for Mac is provided as a free download on our website. The software lies within Education Tools, more precisely Science. This free Mac application was originally created by GeoDa Center.
From the developer:
This application serves as an introduction to spatial data analysis. It is designed to implement techniques for exploratory spatial data analysis (ESDA) on lattice data (points and polygons). It provides a user friendly and graphical interface to methods of descriptive spatial data analysis, such as spatial autocorrelation statistics, as well as basic spatial regression functionality.
You may want to check out more software for Mac, such as Geodes, OpenGeoDa or Easy Books, which might be similar to GeoDa.