ok first off i love this forum and iv found answers to alot of my problems here second im also new third i want to apologies in advance if this topic has been discussed already now then so i got myself a iphone 4 yesterday not the 4S just the 4. i accidentally let itunes upgrade it to the ios 5.1 and i jailbroke it but cydia will not work and when i do get it to open up it wont let me search for anything nor will it let me add any repo addresses. so what i need help with is downgrading it to 5.0.1 from 5.1, everything iv found online is using ifaith but! i have a mac and ifaith is for pc! can anybody help me please!!!!!!!!!!!