Everytime I try to restore my iphone on my macbook(whether it was my 3g or my 4) it would always to the progress bar and hang right after it got a little bit pass the apple logo. However I would be able to restore it on my PC just fine. Now I'm trying to downgrade from 4.2.1 to 4.1 using my 4.1 ipsw. I am now getting a new error on my PC (3194). And the progress bar still hangs on my macbook. What do I do to restore now?