I bought the original The Sims for the Mac at CompUSA for $5. I don't really remember how well it played, but if that's what you're looking for, I'll dig it up and give it a try.
If you have the option, get Sims 2 for Windows instead. You have the option to have smooth edged with antialiasing, and the animation is much smoother as well. Not sure if it was open gl problems with the port or what.