– Some older versions allowed restoring with unsigned firmware using kloader or pwned DFU, but support is limited to older devices (iPhone 4s, 5, etc.) and iOS versions.
Restoring an unsigned IPSW (an iOS version Apple no longer officially supports) is not possible through standard tools like iTunes or Finder, as Apple's servers must digitally "sign" the installation. However, advanced users can use free community-developed tools if specific requirements like SHSH blobs ⚠️ Critical Requirements SHSH Blobs unsigned ipsw restore tool free
