Same OSX is a very simple arcade game for the Mac. The objective is to clear the board of tokens by clicking on groups of them of the same color. When you click on a group of the same color, it will disappear and give you a number of points. The bigger the group that you vanish, the more points you will get. The strategy behind the game is to clear the small groups first to form bigger groups of a single color. Then, when you can't add more tokens to a group, you click on it. When you move your mouse pointer over a group, the tokens will be highlighted and you will see how many points you would get for eliminating that group, which helps a lot.
The default game window is small, but from the menubar you can change the size to medium, large or create your own custom size by specifying the width and height of the window.
When you complete a game, you will be shown your score, and it will be saved so that you can compete with other players. The scores are different for small, medium and large games, so there is a high-score board for each of those.
In short, Same OSX is a fun game to kill some time. There isn't any depth to it and I would probably only play it when I don't have something else to play. But it is a free game, it is well designed an fun, so kudoz to the developer for that.