I have a Mac 10.6.8 running redsn0w 0.9.15b3 and when ever I try to jb it says missing keys.plist data for this build. So I try to upload the ios 6 firmware, but then it says that it is not supported by this version of redsn0w. I know it's not a redsn0w problem because I tested it with the ios 4 and 5 firmware files.
P.S. the ios 4 and 5 were downloaded using itunes
P.S. the ios 4 and 5 were downloaded using itunes