How do I get winrar for mac?

Ive just changed from Windows to a Mac but can't seem to extract the SS Kit files as I cant download an appropriate version of Winrar!

Ive created a graphics folder within FM 2013 and placed my club logos pack in there which load up in the game fine, but when I place the Kit packs in there these dont load up to the game.

Any suggestions would really help.

Cheers

https://itunes.apple.com/us/app/the-unarchiver/id425424353?mt=12