img4tool -e RootFS.dmg -k [key] RootFS_decrypted.dmg
Before we dive into the process of modifying an IPSW file, let's discuss some of the reasons why you might want to do so. Here are a few examples: modify ipsw file
While rare, messing with baseband or bootloader files can render a device useless. img4tool -e RootFS
After making changes, you must package the files back into the original structure: Compress the folders back into a Rename the extension back to 📲 How to Restore Your Modified File modify ipsw file