I don't know how this runs under older Mac OS's but under 10.6.4 it bombs out on a regular basis . . . not so much in the normal game but in the other modes. I have not be able to finish a game of Scrabble Golf etc . . . Not good . . . needs an update . . . badly.
Other wise I like the game it needs a user dictionary. as it does not recognise some basic words etc.
If the bugs were fixed i would rate it much higher . . .
unfortunately the demo ran fine then again i only used the standard mode and it only lasts for an hour so I did/could not check everything
Get the demo and try and play as many modes as possible before you buy . . .