BombSquad is a free game for Mac. It is "inspired" in the typical minesweeper puzzle game.
BombSquad has "Aqua" interface and ndividual preferences for sound. It also has some features such as "Zap Clicks", "Crunch Time", an online record book.
The ground rules are well known, and are only to locate a number of bombs found in a square board. It can mark the positions where we believe there is a bomb.
Its Minimum requirement: Mac OS X 10.3 - 10.5.