Inferius

Inferius (and it's sister tool, Restituere), is a tool to create and restore custom IPSWs for 64-bit devices using Firmware Bundles, similarly to xpwn for 32-bit devices. Due to how the tool is built, this could be used for many different applications, but currently it's main use is for downgrading devices to previous iOS versions. Note: All custom IPSWs restored with Inferius will require you to boot your device via a computer every time your device is turned off.

Inferius is Latin for 'below', and Restituere is Latin for 'restore'.

Requirements

• A macOS system.
• ldid from Homebrew.
• A 64bit device compatible with checkm8.
• A firmware bundle for the device you are wanting to restore and the version you are wanting to downgrade to.
• A brain.

Disclaimer

• I take NO reponsibility for any loss of data, issues with your device, or anything else if you use Inferius. You accept those risks when you use this tool.

IMPORTANT NOTE

• When restoring custom IPSWs, please use custom IPSWs that were freshly created with Inferius. Older IPSWs made with Inferius can cause a brick, due to Inferius needing to download the LLB and iBoot from a signed firmware, and place them into the custom IPSW.

Usage

usage: ./inferius.py -d 'device' -i 'iOS Version' -f 'IPSW' [-v]

Inferius - Create custom IPSWs for your 64bit iOS device!

optional arguments:
  -h, --help            show this help message and exit
  -d DEVICE, --device DEVICE
                        Your device identifier (e.g. iPhone10,2)
  -i VERSION, --version VERSION
                        The version of your stock IPSW
  -f IPSW, --ipsw IPSW  Path to stock IPSW
  -v, --verbose         Print verbose output for debugging

usage: ./restituere.py -d 'device' -i 'iOS version' -f 'IPSW' [-v]

Restituere - Restore custom IPSWs onto your 64bit iOS device!

optional arguments:
  -h, --help            show this help message and exit
  -d DEVICE, --device DEVICE
                        Your device identifier (e.g. iPhone10,2)
  -i VERSION, --version VERSION
                        The version of your custom IPSW
  -f IPSW, --ipsw IPSW  Path to custom IPSW
  -v, --verbose         Print verbose output for debugging
  -u, --update          Keep data while restoring (EXPERIMENTAL)  

• Inferius is used to create a custom IPSW, and Restituere is used for restoring a custom IPSW.

FAQ

What's the use for this?

• The main use is for downgrading to older iOS versions.

How do I create my own Firmware Bundles?

• There is a guide for creating your own Firmware Bundles in the wiki.

How can I contribute my own Firmware Bundles?

• Make a Pull Request!
• Please make sure that the custom IPSW that your Firmware Bundle creates is usable before PRing.

I have an issue with this tool or need help creating a Firmware Bundle, where can I go for help?

• Join my discord, and I'll be happy to help in #inferius-help!

How do I boot my device after restoring?

• Use either PyBoot or ra1nsn0w.

Can I request Firmware Bundles to be made?

• Absolutely! Just ask in #inferius-help in my discord, and I or someone else will get to it whenever I can.

Can you downgrade to any version, regardless of SEP compatibility?

• No, you are still limited to versions compatible with your current installed SEP version, unfortunately. Hopefully that may change in the future with the amazing work the checkra1n team is doing.

Is this an untethered restore?

• No, any custom IPSWs restored will still require you to boot manually with a computer, using either PyBoot or ra1nsn0w.

Credits

• NotHereForTheDong for beta testing & contributing bundles.
• Renaitare for beta testing.
• Chibibowa for beta testing.
• Moses for beta testing.
• Matty for his special build of futurerestore that allows restoring of custom IPSWs.