You could have downloaded Shaaft 1.1 for Mac from our software library for free. The actual developer of this Mac application is Frank Becker. Shaaft for Mac lies within Games, more precisely Puzzle.
From the developer:
Shaaft is a three-dimensional block stacking game. The blocks fall into a shaft (also known as the pit). The aim of the game is to complete layers (instead of rows). Incomplete layers cause the blocks to build up and reduce the available space. The game ends when some blocks no longer fit into the shaft.
You may want to check out more Mac applications, such as The Race, Flip Words 2 or Unsolved Mystery Club - Amelia Earhart, which might be similar to Shaaft.