You could have downloaded ChessPuzzle 2 2.2.0 for Mac from our software library for free. The software belongs to Games. This free Mac app is a product of Applepi.
From the developer:
ChessPuzzle 2 is an easy to use puzzle solving game designed for enjoyment and overall chess improvement. In addition to over 6,000 exciting and challenging puzzles to solve, ChessPuzzle 2 includes a powerful, built-in chess engine. This game can give expert advice in any position, play out your solutions as a friendly opponent and even play a full game at master level.
You may want to check out more Mac applications, such as DotBot, Phantasia or Tribbi, which might be similar to ChessPuzzle 2.