Modify Ipsw | File

# Unmount hdiutil detach /Volumes/iPhoneRoot hdiutil create -format UDZO -srcfolder modified_root modified_fs.dmg Rename to Restore.ipsw mv modified_fs.dmg Restore.ipsw Rebuild the IPSW zip zip -r custom_firmware.ipsw *

Technically, yes. But there’s a catch: Apple’s cryptographic signing process . If you change even one byte, the file will no longer be valid for a standard restore on modern devices. modify ipsw file

If you just want to customize iOS, look into or Dopamine / palera1n — they modify the running OS without permanently altering the IPSW. modify ipsw file