Semaphorin
64-Bit Downgrade, Dualboot & Jailbreak Utility

No support

Do not expect updates to this anymore, especially with all that has happened surrounding this tool

It may be better for someone to rewrite the entire thing, and/or just create or use another tool

Other iOS versions not listed in the chart may also work but they might have unexpected broken features/jailbreak

This script deletes everything on your phone, including the main OS if you are not downgrading to iOS 10.3 or later. Make sure to backup all of your data before using this script as anything on the device prior to running this script will be unrecoverable afterwards. Use this script at your own risk. We are not responsible for any damages caused by you using this script.

This script will automatically set up a dualboot for iOS 10.3 and later.

To use this app, you need to downgrade to a supported version, and have a supported device.

xcode-select install to install git on macos

git clone https://github.com/LukeZGD/Semaphorin && cd Semaphorin

Connect device in DFU mode

sudo ./semaphorin.sh <the version you are downgrading to> --restore

For example you may write sudo ./semaphorin.sh 9.3 --restore

The script has to backup important files from your current iOS version before you can downgrade.

When the script asks [*] Please enter the iOS version that is currently installed on your device., type your current iOS version and then hit the Enter key to continue.

It should then begin the process of downgrading your device. Please follow the on screen instructions. This might take a while. Your device will reboot multiple times.

If you downgraded to iOS 9 or later, please use the jailbreak app on your home screen to begin jailbreaking your device.

For iOS 7 and 8, see below troubleshooting steps for jailbreaking.

Connect device in DFU mode

sudo ./semaphorin.sh <the version you downgraded to previously> --boot

For example, if you downgraded to iOS 9.3, you would run sudo ./semaphorin.sh 9.3 --boot.

It should just boot to your requested iOS version normally.

macOS Catalina or later, or Linux. The script only officially supports these versions.

Hackintoshes with AMD CPUs will NOT work with this.

Stable internet connection. Please don't try using this with dial up...

At least 20GB of free space on your computer

USB Type-A port and Lightning cable. USB Type-C ports will NOT work with this script. If you're using a Mac that only has a USB-C port (such as 12" MacBooks, and late Intel MacBook Airs) a dongle/dock with a USB-A port should work just fine with a standard USB-A to Lightning cable.

Working iDevice: The script has to backup apticket.der, sep-firmware.img4, Baseband, and keybags from your device before you can downgrade to an older iOS version.

We will not be providing any support for any method of deleting /Applications/Setup.app with our script.

This is only to comply with r/jailbreak and r/LegacyJailbreak rules and guidelines.

The script will downgrade your iOS version and jailbreak the downgraded OS very easily, but will not allow for bypassing any sort of Activation Lock.

We back up the activation_records from your main OS prior to downgrading your device, so please make sure your main OS is activated before using this tool.

The issue that causes deep sleep is unfortunately unfixable. There is, however, a workaround to this:

Install the tweak "Insomnia" from BigBoss repo or "Fiona" from the repo https://julioverne.github.io

*Note: This does slightly affect battery life due to the way it works. You probably aren't using this script for battery life though, are you.

This is caused by an issue that's impossible to fix. You need to connect to an open WiFi network

You can create one using the Internet Sharing feature on macOS or linux-wifi-hotspot on, you guessed it, Linux if you prefer using another computer for this.

Be careful when doing this since anyone can connect to the open network you created. We are not responsible for any damages caused by doing this.

Open Terminal, type su -> alpine (input is invisible but still being typed) -> reload

This is to be done every (re)boot

It may fail the first time due to a malloc error, just close out of Terminal and re open the app. Do the same process over again and it should respring the device. All the apps on your device should now be working properly if you follow these steps.

Use the FileManager app on the home screen instead. It is a drop in replacement for Safari, and has a built in download manager also. Until further notice, this does not work on iPads, due to it being missing from the home screen and not being able to launch the app from Safari. This may be fixed at a later date. Sorry for the inconvenience. As a workaround, for iPads only, you can sign into App Store and download https://apps.apple.com/us/app/unlimfilemanager/id456683394 from there.

iPads have uicache issues with most jailbreaking tools. To open Cydia, enter cydia:https:// in Safari's address bar and press Enter.

iPads have uicache issues with most jailbreaking tools. To open Cydia, enter nvwastone:https:// in Safari's address bar and press Enter.

iPads have uicache issues with most jailbreaking tools. To open Meridian, enter meridian:https:// in Safari's address bar and press Enter. Until further notice, this does not work, due to Safari not working on that version of iOS. This may be fixed at a later date. Sorry for the inconvenience.

iPads have uicache issues with most jailbreaking tools. To open Terminal, enter mterminal:https:// in Safari's address bar and press Enter.

• PsychoTea for MeridianJB which we use for iOS 10.3.3 downgrades
• coolstar for Electra and Chimera jailbreaks which we use on iOS 11 and 12 downgrades
• edwin170 for a ton of help with fixing cell service, icloud, audio, 3d touch, gyroscope, microphone and other issues
• johndoe123 for the a7 ios 7 downgrade guide which made this entire project possible
• LukeZGD for the updated cydia.tar for jailbreaking older ios versions
• TheRealClarity for wtfis.app which we repurposed to run evasi0n7 for sandbox patch on ios 7 to allow cydia substrate to not break apps
• Nathan for the ssh ramdisk and iBoot64Patcher fork
• Mineek for seprmvr64 and other patches. I want to give a very special thanks to Mineek, if it werent for them this entire project would have not been possible. you are amazing and i appreciate all that you do, thank you so much
• nyuszika7h for the script to help get into DFU
• tihmstar for pzb/original iBoot64Patcher/original liboffsetfinder64/img4tool
• Tom for a couple patches and bugfixes
• xerub for img4lib and restored_external in the ramdisk
• Cryptic for iBoot64Patcher fork, and liboffsetfinder64 fork
• libimobiledevice for several tools used in this project (irecovery, ideviceenterrecovery etc), and nikias for keeping it up to date
• Nick Chan general help with patches and iBoot payload stuff
• Serena for helping with boot ramdisk.
• planetbeing for dmg tool from xpwn
• exploit3dguy for iPatcher which is used for patching iBoot on ios 7
• dora2-ios for iPwnder
• NyanSatan for fixkeybag