If you update your iOS devices with iTunes, definitely you take some minutes to download the large IPSW file from iTunes into your Mac or Pc. You may need the IPSW one day, so I suggest you to back it up. However, where does it stored in iTunes? The IOS 6 store location in iTunes may differ from Mac OS X version by version. The location i recommend below is with latest OS X Mountain Lion. Check it out after the break.
Where To Find IOS6 IPSW In iTunes [Mac]
Guys, I found the IOS6 IPSW accidentally when I backup my iPad application ^^
The iTunes library file actually was hidden and you will not able to see it. In order to check it, follow instructions below:
1. Open Finder in OS X Mac.
2. Press Shift + Command + G.
3. You should see the file location prompt message.
4. Type in /users/username/library
5. You should see your IPSW stored inside the folder.