Firmware signatures are required to install a particular firmware version onto iOS devices like the AppleTV. When installing the latest version, these signatures will be created in real-time during the iTunes restore process. However, from time to time some firmware versions will stop being ‘signed’ by Apple, which will prevent them from being installed. Backing up your firmware signatures allows you to retain the ability to install an older firmware version in the future, should the need ever arise.
In order to save your Apple TV firmware signatures you will need to use a tool like TinyUmbrella or you can even save them directly through aTV Flash (black).
We will have a how to guide available for saving your firmware signatures in the near future, but until that time you can download Seas0nPass 0.8.2 from the iJailbreak Downloads Section or from one of the download mirrors below.
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