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Research Updated Feb 25, 2023

Cheyote Jailbreak for iOS 15 – iOS 15.1.1

Promotion image of Cheyote Jailbreak article.

Recently, a lot of iOS 15 proof-of-concept exploits (PoC) were announced to allow stable kernel read and write. Cheyote is the first jailbreak announced by CoolStar to support iOS 15 / iPadOS 15 and an option to install Sileo Package Manager on your iPhone or iPad.

Download Cheyote Jailbreak IPA

Cheyote Jailbreak for iOS 15 has not been released. CoolStar says it may happen in June 2023, but it's more like a joke. Libhooker was never updated to support rootles jailbreaks.

What is Cheyote Jailbreak?

Cheyote is a new, rootless jailbreak tool designed specifically for the latest versions of iOS and iPadOS on iPhones and iPads. The jailbreak is capable of supporting devices ranging from A8 to A11 with iOS versions 15.0 to 15.1.1, allowing for easy implementation of new exploits.

However, it's important to note that only devices with A12+ chips are supported for iOS 15.0 to 15.1.1. This means that popular models such as the iPhone 12, iPhone 11, iPhone SE, iPhone XS Max, and iPhone XR are only compatible with Cheyote up to iOS 15.1.1. It's possible that support for newer iOS versions, such as 15.2 to 15.4.1, will be added in the future.

CoolStar, a prominent figure in the jailbreak community, recently announced that the Cheyote Jailbreak would be her final release. After 9 years of involvement in the community and 5 years dedicated to developing tweaks and creating jailbreak tools, she has decided to move on from this aspect of her work. Unfortunately Cheyote Jailbreak for iOS 15 was never released.

Note: Xinaa15 Jailbreak was released with support for iOS 15.0 – iOS 15.1.1 on A12+. Unlike Cheyote, this jailbreak is under active development and tweak support.

Two screenshots showing the interface of Cheyote Jailbreak for iOS 15.

Cheyote jailbreak, also known by its code name “Taurine15”, is the successor to the Taurine app for iOS 14. As with its predecessor, the Cheyote jailbreak provides the ability to jailbreak your device and install Sileo, a popular alternative to Cydia, to give you access to a vast library of tweaks and apps on your jailbroken device. With Cheyote, users can easily browse and download tweaks and apps from popular repositories, enhancing the functionality and customization of their jailbroken device.

Unlike traditional jailbreaks, Cheyote is a rootless jailbreak solution, meaning that not all tweaks will work immediately as they did with previous jailbreaks. Developers will need to update their tweaks to support this jailbreak in order for them to function properly. However, with this rootless design comes added security and stability for users. The Cheyote jailbreak utilizes the updated libhooker library and offers initial support for iOS 15, making it easier for developers to port their tweaks and hacks to the latest jailbreak release.

Libhooker library is also used by other jailbreak apps such as Taurine, Odyssey, and Chimera for older iOS releases. Like all other jailbreak tools released by CoolStar also Cheyote is a semi-untethered jailbreak. Every restart of your device will remove the jailbreak from your iPhone or iPad. To change the state to jailbroken, you need to re-jailbreak your device again.

Fortunately, there is a new bug where CoreTrust will allow using of any root certificate to permanently sign any IPA file for all jailbroken devices running iOS 15.0 up to iOS 15.4.1. With a script like Permasigner you can permanently sign the Cheyote Jailbreak IPA. This way the app will not get revoked after 7-days or even when you will return to stock iOS.

Using Cheyote Jailbreak is really simple and easy. After installing the Cheyote app on your iDevice it automatically recognizes if your iPhone or iPad is supported. The main screen offers a few options to choose from. There is a button to jailbreak your iOS 15 device and an option to swipe to the jailbreaks developers or settings page.

From the Settings page, you have an option to enable and disable globally running jailbreak tweaks, change app theme and select two colors for the background, set nonce generator, restore the device from jailbroken to stock iOS, enable log window, and go to recovery.

Cheyote Jailbreak installs Sileo as the default package manager for iOS 15, but users will be able to install alternatives if they wish, such as Zebra. On top of that, Cheyote Jailbreak will inform you about updates and allow you to download within the app the latest releases of the jailbreak tool. There is also a changelog included, so you will know what's new in the release.

Taurine Jailbreak is an open-source project and all files are available via GitHub Repository. You can build the project with 3 simple steps on macOS. Code for version 1.1.0 was released. As long as you have standard libraries for Xcode projects (version 7) you are good to go. 51% of the code is written in Swift. Source Code is under BSD 4-Clause License.

Cheyote app user interface will be open-sourced around two weeks after being released, and the remaining components of the jailbreak will be open-sourced longer down the road.

Jailbreak iOS 15 – iOS 15.1.1 progress

  • breaking out sandbox.
  • getting root.
  • getting read/write access to filesystem except for rootfs.
  • break AMFI / codesign.
  • run shell commands.
  • fix fork() on A12+.
  • get OpenSSH running.
  • get legacy launchd injection working.
  • add USB Ethernet debug support.
  • get userspace reboot working.
  • get Cheyote recover working.
  • get system service started properly after the userspace reboot.
  • run tweak in SpringBoard.
  • make sure changing SSH root password works.

What's new

  • Initial release with support for iOS 15.0 up to iOS 15.1.1.
  • Updated libhooker library to support iOS 15.
  • Renamed the project from Taurine15 to Cheyote.

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