Sims for Mac's???

[SaltyOne]

Are there any sims available for Mac OS 10.xx? I downloaded the CRRC sim and it works fine on my Mac. I just am getting a little bored with the sim even though it is well done. I see the PC based sims with a lot more features. I've searched and haven't been able to come up with a commercially available sim for native Mac OS. I also haven't had any luck getting my FS1 to run using XP inside Paralells on my Mac. I have an idea this a losing proposition. Any thoughts are appreciated. Thanks.

George