When you think of tetromino games on Max OS X, you probably think of Quinn. Or perhaps Tetris Friends, or even less likely, Tetris Zone.
Well, prepare to forget any of those ever existed.
NullpoMino can do a convincing simulation of almost any Tetris game you can imagine. It's also got nearly lag-free network support which, thanks to being based on Java, allows you to play cross-platform versus your Windows and Linux friends.
Just about the only thing it's missing is a large player base. But with the recent release of version 7.5 greatly improving both ease of installation and general user experience, that will hopefully be changing soon. And if there are any features you think it should have, the developers are more than happy to listen to suggestions.
There are also domino game modes based on Puyo Puyo, Dr. Mario, and Super Puzzle Fighter if you care about that kind of stuff.