I'm looking for a Mac compatible software that I can use to create a media room. Any suggestions?

Google sketchup is free, and works quite well on a Mac. It can help conceptualize a room and layouts, if that's what you're after.

Here's a thread I started about our room, where I did some sketches of the room with that software, trying different arrangements. It's got a bit of a learning curve, but not too bad to work with.

http://www.avsforum.com/avs-vb/showthread.php?t=1170836

I haven't been too successful with Sketch-Up, probably just not enough time with it. In looking for something else I found http://www.belightsoft.com/products/liveinterior/overview.php. I downloaded and am trying it out. Its not free but it seems pretty intuitive and powerful. I haven't had time to do more than just toy with it, but I'll probably end up buying it.