Checkra1n

checkra1n

Original author(s)	qwertyoruiop
Developer(s)	qwertyoruiop, argp, axi0mX, danyl931, jaywalker, kirb, littlelailo, nitoTV, nullpixel, pimskeks, sbingner, Siguza, T2 work by t8012 checkm8
Initial release	10 Nov 2019 (2019-11-10)
Stable release	0.9.8.2 beta / 8 March 2020
Development status	Active
Operating system	macOS, Linux
Available in	English
Website	checkra.in

checkra1n is a semi-tethered jailbreak, developed primarily by Luca Todesco (qwertyoruiop). It's based on the checkm8 bootrom exploit released by axi0mX. checkra1n supports iOS 12.3 and newer, iPadOS 13.1 and newer, and tvOS 12.0 and newer. Experimental support was added in 0.9.9 for the T2 processor.

Release History

Version	Date	Changes
0.9 beta	10 November 2019	Initial release
0.9.1 beta		An issue where the loader app would crash when installing Cydia on iPads A crash when the macOS language was set to anything other than English An issue where iPad Minis would not work with the GUI An issue with the scp binary not working as expected
0.9.2 beta	11 November 2019	Fixed an issue where the Apple Watch would not receive notifications while jailbroken Improve reliability of entering DFU mode Fixed an issue where checkra1n could not be used on macOS 10.10
0.9.3 beta	13 November 2019	Fixes an issue where biometrics did not work for some users Fixes an issue where the touch screen became unresponsive for some users Fixes an issue where the loader app may not have appeared on the homescreen Fixes an issue where the iPad Smart Keyboard did not work Fixes an issue where the fast charging functionality did not work on some devices Fixes an issue where the taptic engine did not work on some devices Fixes an issue where battery settings did not load for some users Detect a case where the user may have an OTA update downloaded, which caused issues for some users
0.9.3.2 beta		Fixes an issue where biometrics did not work for some users Fixes an issue where the touch screen became unresponsive for some users Fixes an issue where the loader app may not have appeared on the homescreen Fixes an issue where the iPad Smart Keyboard did not work Fixes an issue where the fast charging functionality did not work on some devices Fixes an issue where the taptic engine did not work on some devices Detect a case where the user may have an OTA update downloaded, which caused issues for some users
0.9.5 beta	15 November 2019	Bug Fixes: Fixes an issue where the user may be signed out of their Apple ID Fixes an issue that caused MobileSubstrate initialization to be delayed Detect a case where the user may have an OTA update downloaded, which caused issues for some users The following issues are caused by incorrect DFU mode entry, please make sure to follow the instructions in the UI: An issue where the taptic engine did not work on some devices An issue where biometrics did not work for some users An issue where the touch screen became unresponsive for some users Other Changes: This update includes a new fast DFU sequence. Entering DFU mode should now be safer and more reliable. The loading mechanism for substrate has improved in this update, which improves the stability of the device.
0.9.6 beta	1 December 2019	Bug Fixes: Fixes support for the iPad 6th Generation Fixes an issue where A7 devices would report an error code on success Fixes an issue where jailbreak app icons would show up on the boot after using loader’s “Restore System” functionality Makes the loader app more resilient to errors occurring after a long uptime Fixes an issue where Loader and Cydia would fail with a no internet connection message on Chinese iPhones Fixes an issue where the the iPad Pro Smart Keyboard would disconnect Fixes an issue where fast charging did not work Other Changes: Add support for jailbreaking Apple TVs from within the same app Added support for the iPad 5th Generation, iPad Air 2nd Generation the iPad Pro 1st Generation Added support for iOS 13.2.3 Re-engineered the command line interface from the ground up Drastically improved loader’s speed Restructured loaderd and friends into separate launch daemons to survive userland reboot and removed insult from daemon name Export kernel base and other useful things for developers (see jbctl for details)
0.9.7 beta	14 December 2019	Bug Fixes: Fixes an issue which prevented the GUI from detecting changes in device modes Fixes an issue that caused the GUI to hang when jailbreaking some iPad models Other Changes: Add initial Apple TV 4K support Purge OTA updates on boot Add support for iOS 13.3 Remove libimobiledevice as a dependency Properly handle situations where there’s no internet connection available while bootstrapping tvOS Add a Control Center shortcut for the tvOS loader app Known Issues: The Apple TV 4K will produce a -20 error, even on a successful jailbreak
0.9.8 beta	5 February 2020	Bug Fixes: This release squashes so many bugs we couldn’t keep track of them. Sorry bugs… Other Changes: Support for Linux has arrived! See below for more information. Introduces webra1n (see below!). Low-level patching is now handled by our all-new pongoOS, engineered from the ground up for flexibility. More news on this front soon! Adds a whole new CLI, built around ncurses, which now supports FastDFU. Adds a new --version flag to the CLI for debugging purposes. Adds a new option in the GUI and CLI which allows for custom boot-args to be set. Adds an option to skip version checking for new iOS and iPadOS versions which haven’t yet been officially tested. Added support for iOS and iPadOS 13.3.1. The checkra1n app no longer requires internet to open. Known Issues: The Apple TV 4K will produce a -20 error, even on a successful jailbreak
0.9.8.1 beta	4 March 2020	Other Changes: Support Project Sandcastle Known Issues: The Apple TV 4K will produce a -20 error, even on a successful jailbreak
0.9.8.2 beta	8 March 2020	Other Changes: Bumping maximum device tree size to 256KiB for Project Sandcastle. Fix architecture mismatch for devhelper builds. Known Issues: The Apple TV 4K will produce a -20 error, even on a successful jailbreak