Working with a lot of Mac users over the last few years I have realised that they just don't seem to have enough tools to do what is commonplace o windows and one of these is using a rar compression or the more upcoming 7zip format. Here is an opensourde program to get it done for you.
Uncompress RAR, 7zip, tar, and bz2 files on your Mac. Many new Mac users will be puzzled the first time they download a RAR file. Do them a favor and download UnRarX for them!
Download Here!