i downloaded wrar 3.8 so i could use Tommy Boy's meshes but the program won't work on my mac. its the new macbook and it doesn't seem to recognize the files.
I just got time to google up this:
http://www.ehow.com/how_2091902_open-rar-files-mac.html
http://mac.softpedia.com/get/Compression-Tools/RAR-Expander.shtml
hope it helps.
Also:
http://www.zipeg.com/mac.video.html (http://www.zipeg.com/mac.video.html)
Provides a demonstration video too ^^