Once your device reboots, open the app on your home screen.
Select . The tool will automatically force your device into Recovery Mode (displaying a lightning cable pointing toward a computer icon).
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Always back up your iOS device via iCloud or local iTunes before attempting a jailbreak. download checkra1n for windows ios 12.5.5
iOS 12.5.5 is a special firmware. Apple released it long after iOS 13, 14, and 15 launched, specifically to patch security flaws in older devices like the . Because these devices use the A7, A8, and A8X chips, they are vulnerable to the checkm8 bootrom exploit . This makes Checkra1n the only permanent jailbreak for these devices on iOS 12.5.5.
Check the box that says . (While iOS 12.5.5 is well-supported, checking this ensures smooth exploit execution). Select Back to return to the main menu. Step 5: Enter DFU Mode and Jailbreak Navigate to the Start button in Checkra1n and press Enter.
Some developers have created unofficial ports of checkra1n for Windows using libusb and custom drivers (e.g., “checkn1x” or “winra1n”). These are from the official team. They can work, but they carry risks of malware or instability. Once your device reboots, open the app on your home screen
Before diving into the process, it's important to understand the unique relationship between checkra1n and iOS 12.5.5.
A text-based Linux interface will load, automatically launching the . Step 3: Configure Checkra1n Settings
If the "Start" button is grayed out, navigate to using your keyboard arrow keys, select Allow untested iOS/iPadOS/tvOS versions , and go back. This public link is valid for 7 days
Common boot keys include depending on your motherboard. Select your USB flash drive from the boot options list.
Download BalenaEtcher and the Checkn1x ISO (or similar tool like Bootra1n).
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.