Can't Download on My iMac

Basically the same problem as the person in the link above. Someone posted a solution at the bottom, but when I go into show package contents, open contents, there is no option for "RADS." The only contents in the folder are Config, League of Legends, LeagueClient, Plugins, and system.yaml.

I am running and iMac with 2.5 GHz Intel Core i5 4 GB 1333 MHz DDR3 AMD Radeon HD 6750M 512 MB graphics card On Mac OS X Lion 10.7.5

Thank you for your help