Chess Applications for Mac

I have a Mac and played the chess application that came with it. It is a good program, but does anyone know any other good (and non-confusing/complicated/computer science savvy) applications and software for Mac that I can download for free?

I just downloaded Sigma Chess and it's uber confusing to me. I don't really know how to make use of it. There are too many buttons and weird symbols (and I was just a bit lazy to read the manual). So I'm just looking for a really simple application. One where you can just play the game is okay. (I don't care for analysis and stuff like that.)

Any help from you guys will be very appreciated! Thanks!!

Interesting...I have Sigma too. 

But no, I don't know any other Mac programs.

Here's what I do ... but you need the right Mac to accomplish it:

I installed VMware Fusion, and Windows XP. In that I loaded my ChessBase and Fritz ... both PC apps. The best apps are PC-based, unfortunately.

Older Macs won't do this, but Intel-based OSX Leopard systems will.

Do you find Sigma easy and good to use? If so, I'll take the time to read the manual.

Thanks so much DrawMaster! My dad has VMware Fusion on his Mac. I'll just ask him to install it on mine.

I do like using it. Yes, it would be a good idea to read the manual, but once you know how every button works, it's fun to use.

I have the free trial of Sigma Chess, but I like what I saw of the trial of Shredder more. It handles variations better, and the interface is much nicer. The main hesitation I have about Shredder is that its database feature doesn't seem as nice, but I suppose there are enough chess database programs that I can work around that.

I have Chessmaster 10 for my Windows laptop (before I switched to the light side ), but I can't seem to get it to run in Parallels 3 (with XP). But CM10 is incredibly clunky compared to Shredder anyway, so I think I'd be happy just leaving it on my laptop for when I want to access the training features.

Anyway, enough rambling from me. To play a game with Simga Chess is fairly easy. Just go to Game > New Game. If you want to play black, flip the board and then go to Analyze > Go (not very intuitive, but this is how Shredder works as well -- perhaps it's a feature of UCI programs).  The 'undo' and 'redo' buttons at the bottom are really 'back' and 'forward' buttons -- but if you go back and make a move, the entire game from that point forward is overwritten.

To change the engine's playing strength, go to Level > Playing Mode & Level.  To save your completed games to a database, first create a 'collection' file (under the File menu), and then go to Game > Add to collection. You can open up your database later with File > Open, and then double-click to open one of your saved games.  If you make any changes to the saved game, the close button will show the 'unsaved changes' mark (circle instead of x), and if you save the changes, they will be saved in the game in the database.

It does seem like a pretty decent program, especially for the cost ($0.00 so far). The engine puts up a good fight, and the annotation is pretty nice, but I'm not fond of the lack of playable variations or the analysis so far.

Anyway, hope this helps. If anyone has any thoughts on my own ramblings above, feel free to chime in. We Mac weirdos have to stick together..!