You can "modify" the IPSW by stripping away the signature wrapper to access raw binaries.
If you ignore the warnings and proceed, here is how you will fail. modify ipsw file
An IPSW (iPhone/iPad Software) file is a type of firmware file used by Apple devices, such as iPhones, iPads, and iPod Touches. These files contain the operating system, firmware, and software necessary for an Apple device to function. Modifying an IPSW file can be useful for various purposes, including customization, debugging, and creating a personalized firmware image. However, modifying an IPSW file requires careful consideration and technical expertise to avoid damaging the device or violating Apple's terms of service. You can "modify" the IPSW by stripping away
When restoring via iTunes, the SEP firmware (Secure Enclave Processor) checks the iOS version. If you modified the SystemVersion.plist but kept the old SEP firmware, the device restores, then throws Error 14 (SEP mismatch). Recovery: Impossible without a signed iOS version. These files contain the operating system, firmware, and