GreenChess 8.1.3 for Mac can be downloaded from our website for free. This free app can be installed on Mac OS X 10.7 or later. The most popular versions among the application users are 4.1 and 2.2. The bundle id for this app is GreenChess. The software lies within Games, more precisely Board. This free software for Mac OS X is a product of GreenChess.com.
From the developer:
Play a game of chess against GreenChess or Stockfish and view PGN databases.
You may want to check out more Mac applications, such as Simon, Goban or Gomoku - Online Game Hall, which might be similar to GreenChess.