: Components like iBoot that handle the startup process. How to Modify or Analyze an IPSW
Modifying an IPSW is only half the battle. Apple uses a "signing" system. When you try to install a modified IPSW, your device contacts Apple’s servers to verify the file's integrity. modify ipsw file
Replace <IPSW file> with the path to the repackaged IPSW file, <Apple ID> with your Apple ID, and <password> with your password. : Components like iBoot that handle the startup process