To jailbreak iOS 12.5.5 on Windows using checkra1n, you must use a bootable USB drive because there is no official native Windows application. This method uses a lightweight Linux environment (like checkn1x) to run the tool. Prerequisites USB Drive: At least 512MB. Device: iPhone 5s through iPhone X (iOS 12.0 to 14.8.1).
Internet Connection: Required on the device to download the Cydia loader. Step 1: Download Required Tools
Checkra1n ISO/Image: Download a bootable ISO like checkn1x (highly recommended for Windows users) or the official checkra1n file.
Flashing Tool: Use BalenaEtcher to write the image to your USB drive.
Drivers: Ensure iTunes (non-Microsoft Store version) is installed for the latest Apple drivers. Step 2: Create the Bootable USB Plug your USB drive into your PC.
Open BalenaEtcher, select the downloaded ISO file, and choose your USB drive. Click Flash and wait for it to finish. Step 3: Boot into Checkra1n
Restart your computer and enter your BIOS/Boot Menu (usually by tapping F12, F11, Esc, or Del repeatedly during startup). Select your USB Drive as the primary boot device.
Once the Linux environment loads, press Alt + F2 (or Fn + Alt + F2) to launch the checkra1n interface. Step 4: Jailbreak iOS 12.5.5
Connect your iPhone to the computer using a Lightning cable.
In the checkra1n menu, go to Options and ensure "Allow untested iOS/iPadOS/tvOS versions" is checked. download checkra1n for windows ios 12.5.5
Click Start and then Next; your device will automatically enter Recovery Mode.
Follow the on-screen instructions to manually enter DFU Mode (requires a specific sequence of button presses depending on your device model).
Wait for the "All Done" message. Your device will reboot with the checkra1n loader app installed. Step 5: Finalize on Device Open the checkra1n app on your iPhone's home screen. Select Cydia and tap Install.
Once installed, you can open Cydia and begin installing tweaks. Important Notes
Semi-Tethered: This jailbreak is semi-tethered. If your device restarts or dies, you must reconnect it to the computer and rerun the process to re-enable tweaks.
Data Safety: It is highly recommended to back up your device via iTunes or iCloud before starting. Jailbreak IPhone 7 With Checkra1n: A Simple Guide - Ftp
The Journey Begins
It was a sunny Saturday morning for Alex, a tech-savvy individual who loved to tinker with his iPhone. He had been waiting for what felt like an eternity for a reliable jailbreak tool to become available for his device, which was running iOS 12.5.5. After months of searching, he finally stumbled upon checkra1n, a popular jailbreak tool that supported his device and iOS version.
The Search for checkra1n
Alex's eyes widened with excitement as he read about checkra1n's capabilities and compatibility. However, he quickly realized that checkra1n was primarily designed for macOS. He didn't have a Mac, but he did have a Windows 10 laptop. He began to search for a way to download checkra1n for Windows, hoping that someone had figured out a way to port the tool to the popular operating system.
The Solution
After scouring the internet, Alex found a reputable source that offered a Windows version of checkra1n. The website provided a download link, and Alex quickly clicked on it to begin the download process. The file was relatively small, and it didn't take long for it to finish downloading.
Downloading and Preparing checkra1n
Once the download was complete, Alex extracted the files to a folder on his desktop. He then launched the checkra1n executable file, which prompted him to connect his iPhone to the laptop via a USB cable. Alex made sure his device was properly connected and that iTunes was closed.
The Jailbreak Process
With everything set up, Alex clicked on the "Start" button within the checkra1n interface. The tool then began to prepare the jailbreak process, which involved putting his iPhone into a special mode. The screen on his device went black, and Alex patiently waited for the process to complete.
The Magic Happens
After a few minutes, Alex's iPhone rebooted, and the checkra1n logo appeared on the screen. The tool was working its magic, and Alex couldn't help but feel a sense of excitement and anticipation. The jailbreak process was a success, and his iPhone was now running a tethered jailbreak. To jailbreak iOS 12
Cydia and Beyond
Once the jailbreak was complete, Alex installed Cydia, a popular package manager for jailbroken devices. He was now able to browse and install various tweaks, apps, and modifications that weren't available on the App Store. Alex spent the rest of the day exploring Cydia and customizing his iPhone to his heart's content.
The End of the Journey
Alex was thrilled with the results of his journey. He had successfully downloaded and installed checkra1n on his Windows laptop, jailbroken his iPhone running iOS 12.5.5, and opened up a world of new possibilities for customization and exploration. He realized that the journey was just beginning, and he couldn't wait to see what other adventures awaited him in the world of jailbreaking.
Note on accuracy: As of my knowledge cutoff in early 2025, the official Checkra1n team has not released a native Windows version. Windows users must use a bootable Linux USB or a VMware workaround. This article clarifies that reality while targeting your specific keyword.
Checkra1n is a jailbreak tool based on the checkm8 bootrom vulnerability. Unlike software-based jailbreaks (which Apple can patch with an update), checkm8 is permanent hardware flaw in the A5 through A11 chips. This means:
The only downside? Apple’s Secure Enclave on A11 devices (iPhone 8/8 Plus/X) requires disabling passcode temporarily. On A7 devices like iPhone 5s (iOS 12.5.5), there are no such restrictions.
Once Ubuntu loads:
wget https://assets.checkra.in/downloads/linux/cli/x86_64/d41d8cd98f00b204e9800998ecf8427e/checkra1n
chmod +x checkra1n
sudo ./checkra1n
Not natively, but the Linux USB method works on any PC running Windows 7/10/11. What is Checkra1n