Installing Chimera

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Chimera is a semi-untethered jailbreak, meaning it requires a app to re-apply the exploit after a reboot. Click the link to learn more.

If you have a newer device with an A12 SoC, such as the iPhone XS, you can only use Chimera on iOS 12.0 - 12.1.2.

If you are already jailbroken with unc0ver, make sure to properly remove it before installing Chimera.

Chimera is capable of jailbreaking all devices on iOS 12.0 to 12.1.2 and A7 to A11 devices on iOS 12.0 to 12.5.4.

Due to how semi-untethered jailbreaks work, the app will need to be re-signed once every 7 days.

We will use AltStore to install the Chimera jailbreak application to your iOS device for use in the next step.


Chimera is currently signed at for easy installation without a computer.

  • The latest release of Chimera
  • The latest release of AltStore
  • The latest release of iTunes if on Windows
  • The latest release of iCloud if on Windows

If you are running iOS 12.0 - 12.1.4, you will need to use AltDeploy

Installing the application

  1. Download AltStore for your respective operating system
  2. Launch AltStore/AltServer
    • On macOS, open the Mail app and open Mail -> Preferencees in the menu bar
    • Click on the General tab, the Manage Plug-ins, check AltPlugin and apply
  3. Connect your iOS Device to your Mac or PC via USB
  4. Click AltStore/AltServer in the Menu Bar/System Tray
  5. Click Install AltStore
    • Follow all onscreen prompts
  6. Open Settings and navigate to General -> Device Management and verify AltStore
  7. Download Chimera on your iOS Device and open the .ipa in AltStore
    • Make sure your iOS Device and Mac or PC are connected to the same WiFi network

The Chimera application can now be opened from home screen.

Running Chimera

  1. Reboot your phone
    • This is not necessary but recommended
  2. Open the Chimera application from your home screen immediately afterwards
  3. Tap “Jailbreak”
  4. Reboot your phone again when prompted
    • If you are not prompted and it automatically reboots, wait 1-2 minutes, then try again.
    • This time, it is necessary
  5. Once again, open the Chimera application from your home screen immediately after rebooting
  6. Tap “Jailbreak” again
    • If it automatically reboots or crashes and the jailbreak is not installed, wait 1-2 minutes, then try again.

If that app or your device continually crashes/restarts unexpectedly and the jailbreak isn’t installed despite the above steps, attempt to put the device in a freezer for that 1-2 minute period.

You should now be jailbroken with Sileo installed on your home screen. You can use Sileo to install tweaks, themes and more.

Continue to Using Sileo