EotU 0.0561 for Mac could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this app available. This Mac app was originally developed by Slug Disco Studios. The application lies within Games, more precisely Strategy. 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:
Empires of the Undergrowth is a real-time strategy game based around the world of ants. It features underground tunneling, nest construction, and fast-paced battles with insects, arachnids and other ant colonies. The inspiration is taken from the classics Dungeon Keeper and Sim Ant, as well as elements of Starcraft 2's popular 'Desert Strike' arcade game for colony vs. colony combat.
You may want to check out more Mac applications, such as Thief 2X, Ranch Rush 2 Collector's Edition or Jean's Boutique 2, which might be similar to EotU.