Bottom Line: Yes, you can jailbreak iOS 12.5.5 with checkra1n, but you’ll need a Linux live USB from your Windows PC. It takes 10 minutes and works perfectly.
Stay safe and only download from the official source. Happy jailbreaking!
There is no official native application for Windows. To jailbreak iOS 12.5.5 using a Windows PC, you must use a bootable USB drive containing a lightweight Linux environment (like ) that runs checkra1n. Requirements iOS Device:
iPhone 5s, 6, or 6 Plus (A7–A8 chips commonly run 12.5.5). A 64-bit Windows PC and a USB flash drive (at least 2GB). to create the bootable USB. A checkra1n ISO file (e.g., Step-by-Step Guide 1. Prepare the Bootable USB Download the checkn1x ISO Plug your USB drive into your PC. Open Rufus: Select your USB device and choose the checkn1x ISO file. to flash the drive (this will erase all data on the USB). 2. Boot into checkra1n Restart your PC and enter the BIOS/Boot Menu (usually by tapping repeatedly during startup). Select your USB Flash Drive as the boot device.
Once the interface loads, you should see the checkra1n welcome screen. 3. Configure and Jailbreak Connect your iPhone to the PC using a lightning cable. Use the arrow keys to navigate to Allow untested iOS/iPadOS/tvOS versions
is checked (this is often required for specific sub-versions like 12.5.5). and press Enter. Follow the on-screen instructions to put your device into The tool will first put the device into Recovery Mode.
You will then be prompted to hold specific buttons (usually Power + Home) to enter DFU.
Once in DFU mode, the jailbreak process will begin automatically. Wait for the "All Done" message. 4. Post-Jailbreak Setup Your device will reboot. Look for the checkra1n loader app on your home screen. Open the loader and tap to install the package manager.
To return to Windows, exit the tool on your PC, unplug the USB, and restart your computer. checkra1n is a semi-tethered
jailbreak. If your device reboots, the jailbreak will be disabled, and you must repeat the USB boot process to re-enable it. download checkra1n for windows ios 12.5.5
Checkra1n is a community-favorite jailbreak tool because it relies on a hardware vulnerability that Apple cannot patch with software updates. If you are looking to download checkra1n for Windows to jailbreak iOS 12.5.5, it is important to understand that a native Windows ".exe" file for this tool does not officially exist. However, you can easily run it on a Windows PC using a bootable USB drive.
This guide will walk you through the process of setting up and using checkra1n on your Windows machine to unlock your iOS 12.5.5 device. The Reality of Checkra1n on Windows
The checkra1n jailbreak is built on the "checkm8" exploit. This exploit requires specific low-level access to USB controllers that Windows handles differently than macOS or Linux. Because of these technical hurdles, the developers have not released a direct Windows installer.
To get around this, Windows users utilize checkn1x or Odysseyn1x. These are lightweight, Linux-based "Live" environments that fit on a USB drive. You boot your computer from the USB, run the jailbreak, and then restart back into Windows. It is safe, fast, and does not affect your Windows files. Prerequisites Before You Start
Before attempting the jailbreak, ensure you have the following items ready: A Windows PC: Any standard laptop or desktop will work. A USB Flash Drive: At least 256MB of space is required.
A Compatible Device: Checkra1n supports A7 through A11 chips. For iOS 12.5.5, this typically includes: iPhone 5s, iPhone 6, and iPhone 6 Plus. iPad Air, iPad Mini 2, and iPad Mini 3. iPod Touch 6G.
A MFi Certified Cable: Avoid using USB-C to Lightning cables; standard USB-A to Lightning cables are much more reliable for DFU mode. Step 1: Download the Necessary Files You will need two specific files to make this work:
The ISO Image: Download the latest version of checkn1x (this is the most stable version of checkra1n for bootable USBs).
The Flashing Tool: Download Rufus or BalenaEtcher. These programs allow you to "burn" the ISO image onto your USB drive so it becomes bootable. Step 2: Create the Bootable USB Plug your USB drive into your Windows PC. Open Rufus. Under Device, select your USB drive. Bottom Line: Yes, you can jailbreak iOS 12
Under Boot selection, click "Select" and choose the checkn1x ISO file you downloaded.
Click Start. This will erase everything on the USB drive, so make sure you don't have important files on it. Once the process is "Ready," close Rufus. Step 3: Booting into Checkra1n Keep the USB plugged in and restart your computer.
As the computer starts, repeatedly tap your Boot Menu Key. This is usually F12, F11, Esc, or F10 depending on your motherboard brand (e.g., Dell is F12, HP is F9 or Esc). Select your USB Flash Drive from the list of boot options.
Your PC will now load a simple terminal interface. Within seconds, the checkra1n GUI will appear on your screen. Step 4: Jailbreaking iOS 12.5.5 Connect your iPhone or iPad to the computer.
If checkra1n says your device is not supported, go to Options and check the box for "Allow untested iOS/iPadOS/tvOS versions." (Note: Since iOS 12.5.5 is older, checkra1n usually recognizes it immediately).
Click Start. The tool will ask to put your device into Recovery Mode. Click Next.
Follow the on-screen instructions to manually put your device into DFU Mode. This usually involves holding the Power and Home buttons in a specific sequence.
Once the device enters DFU mode, the exploit will run. You will see a "verbose" boot (code scrolling on your iPhone screen). When the tool says "All Done," your device will reboot. Step 5: Finalizing the Process
Unplug your device and restart your PC to go back to Windows. No, it is semi-tethered
On your iPhone/iPad, you should now see a new app icon called checkra1n. Open the app (ensure you are connected to Wi-Fi). Tap on Cydia and select Install. Once Cydia is installed, you are officially jailbroken! Important Safety Reminders
Semi-Tethered Status: Checkra1n is a semi-tethered jailbreak. If your device dies or you restart it, the jailbreak will disappear. You will need to plug it back into your USB boot drive to re-enable it.
Passcode/TouchID: For A11 devices (iPhone 8/X) on iOS 14+, you must disable the passcode. However, for iOS 12.5.5 on older devices, you can keep your passcode and TouchID active without issues.
Backup Your Data: Always perform an iCloud or iTunes backup before jailbreaking. While checkra1n is very stable, it is always better to be safe. Have you ever used a bootable USB before?
Are you getting any specific error codes (like Error -20 or Error -31)?
I can provide troubleshooting steps tailored to your hardware.
No, it is semi-tethered. After a reboot, you need a computer to re-jailbreak.
To jailbreak iOS 12.5.5 (supported on iPhone 5s, 6, 6 Plus, iPad mini 2, etc.) using the Checkra1n exploit, you must:
Not natively, but the Linux USB method works on any PC running Windows 7/10/11.
Once Ubuntu loads: