You could have downloaded Magarena 1.83 for Mac from our application library for free. The software lies within Games, more precisely Card. The actual developer of this free software for Mac is Magarena.
From the developer:
Magarena is a single-player fantasy card game played against a computer opponent. The rules for Magarena are based on (but not exactly the same as) the first modern collectible card game. Its main goals are an advanced AI, intuitive interface, engaging gameplay and program stability.
You may want to check out more Mac applications, such as FreeCell Plus trial, PatienceX Demo or Mystical Solitaire, which might be related to Magarena.