To write the ISO file to the USB drive (download here).
To bridge this gap, independent developers created , a custom, stripped-down Linux ISO built using Alpine Linux. Weighing under 50MB, it boots directly from a USB drive into RAM, cutting out OS bloat and focusing entirely on running Checkra1n.
Download checkn1x-1.0.6-amd64.iso from a trusted source like the official GitHub repository .
and enter the BIOS/Boot Menu (usually F2, F12, Delete, or Esc). Select your USB drive as the boot device. checkn1x106amd64iso full
It is a bare-bones Linux distribution (often under 50MB) that contains only the necessary components to run checkra1n.
If successful, you will see "All Done" and your iPhone will boot with the checkra1n loader app installed.
Because Boot ROM code is burned into the silicon during hardware manufacturing, Apple cannot patch this vulnerability via standard over-the-air iOS software updates. Device Compatibility Spectrum To write the ISO file to the USB drive (download here)
: This is an internal timing flaw in your PC's controller hardware. Unplug the Lightning cable from your phone for exactly 1 second, then plug it right back in while the text is on screen.
: iPad (5th, 6th, and 7th generation), iPad Air (1st and 2nd Gen), iPad mini (2, 3, and 4), and early iPad Pro models iPod : iPod Touch (6th and 7th generation) Apple TV : Apple TV HD (4) and Apple TV 4K Supported Operating Systems
Connect your iPhone or iPad to the PC using a lightning cable. Arrow Keys to navigate the Checkn1x menu and select The tool will ask to put your device into Recovery Mode . Follow the on-screen prompts. Once in Recovery Mode, you will be guided to enter Download checkn1x-1
Jailbreaking your iPhone or iPad with the tool usually requires a macOS or Linux environment. For Windows users, this barrier often meant complicated setup processes, virtual machines, or dual-booting Linux. Checkn1x changed that by providing a lightweight, bootable Linux ISO that brings the checkra1n experience to any PC.
: The standard disk image format ready to flash onto a spare USB drive. Core Hardware & Software Compatibility
The official checkra1n utility was originally built exclusively for macOS and Linux. Windows users were left unable to run it due to the complex ways the Windows operating system handles lower-level USB controller protocols during an Apple device's Device Firmware Update (DFU) mode.
If you have a newer iOS version (15+) and an A7–A11 device, is the tool you should investigate. For iOS 12–14, checkn1x remains an excellent, stable choice.
The "amd64" tag ensures it works on almost all modern 64-bit Intel and AMD processors.
