Apple ipod

How to Downgrade iPhone firmware 1.1.2 on Mac OSX Leopard?

I've been trying to downgrade my iPhone to firmware 1.1.1 to jailbreak and instruction can not seem to work. "M running on Mac OS Leopard and I have iTunes 7.5 (if this is useful). I really need help with this, then instruct appreciated. THANKS! :]

try tube. There are plenty of videos on this subject. I hope you're in luck.

iPod touch Jailbreak 3RD GENERATION 3.1.3! MC Model! Mac or PC! MARCH 2010!