The Eternally Grey 1.0 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 free Mac application was originally produced by ippa. The following version: 1.0 is the most frequently downloaded one by the program users. The program lies within Theming Tools, more precisely Themes. We recommend checking the downloaded files with any free antivirus.
From the developer:
The Eternally Grey is a free game where you must defend the gems from the miner menace.
With a great atmosphere and emotional touches with providing the cavern's perspective on the 'children' being stolen. It is fun time playing this game. It has good music and your take on the Cavern theme.
You can enjoy seeing how even with that premise we both explored very different aspects of that concept.
You may want to check out more software for Mac, such as Grey Tower X, Mahjong Towers Eternity or Eternity Warriors 2, which might be related to The Eternally Grey.