The message typically occurs when the jailbreak tool cannot properly communicate with your device via USB due to missing or misconfigured drivers on your computer . Why This Happens
When the iOS device reboots, the jailbreak is lost. The checkra1n app driver is still installed (on the filesystem), but it is not loaded into the kernel. Re-running checkra1n from a computer re-triggers the bootrom exploit and reloads the driver. The in-app driver installation only needs to happen once after the initial jailbreak to place the files; thereafter, the computer-based jailbreak process reloads them automatically. checkra1n app required to install a driver to work correctly
This time, the driver acted as the bridge. The MacBook sent a jolt of code through the USB cable. Because the driver was now listening, it could catch the iPhone's attention during that microsecond of vulnerability in the boot process. "checkra1n app required to install a driver to
After installing the driver, reboot your Mac and re-enable SIP ( csrutil enable ) if desired, though some users keep it disabled during the jailbreak process. Re-running checkra1n from a computer re-triggers the bootrom
Q: What is the checkra1n app? A: The checkra1n app is a free, open-source jailbreak tool that allows users to jailbreak their iOS devices.