Just after the release of redsn0w 0.9.5 beta 5 release 3, many of users are facing the error message “unable to recognize specified IPSW”. This message keeps popping up as you try to browse for iOS4 for iPhone 3G or iPod Touch 2G.
Update: See solution at the end of the post.
Here is the screenshot of the error message:
There is no word from iPhone Dev team on this error message while plenty of users continue to face problems with redsn0w 0.9.5 beta 5-3.
There could be two reasons that redsn0w is not detecting iOS 4 IPSW. You may be using wrong version of redsn0w, be sure to use redsn0w 0.9.5 Beta 5-5 (download: Windows | Mac). Other reason could be that you’ll be using wrong version of iOS 4. Redsn0w 0.9.5 B5-5 won’t detect iOS4 GM IPSW. You must have final version of iOS 4 (Direct download links). Use these tools and follow our step by step guide on how to jailbreak iOS 4. There won’t be any problems this time around.
Update: If you are still facing this error message, try keeping your files in a location other than desktop. Moving redsn0w and IPSW files in some directory is reportedly working for some users. Also try with all the files in same directory.
If you still face any problems, do let us know in comments.
Mac users with iPhone 3GS, 3G (Old bootrom only) can now jailbreak iOS 4 with PwnageTool 4.0. Windows users should wait for sn0wbreeze 1.6.
For those who are still out of luck despite following the workarounds posted here, give redsn0w 0.9.5 Beta 5 release 4 a try. Release 4 primarily fixes the iBooks issue but you can try it out if release 3 doesn’t recognize your IPSW. If you still face problems, try an alternate:
Mac Users: Use PwnageTool
I hope this helps.