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Stage 1 and stage 2 bootloader for Apple devices
iBoot is the stage 1 and stage 2 bootloader for iPhones, iPads, Apple silicon-based Macs, and the T2 chip in Intel-based Macs with such a chip. Compared
IBoot
File format used in iTunes to install iOS firmware
and a "Firmware" folder which contains iBoot, LLB (Low-Level Bootloader), iBSS (iBoot Single Stage), iBEC (iBoot Epoch Change), the Secure Enclave Processor
IPSW
Unofficial term referring to digital signatures Apple generates and uses
iBEC and iBoot will decline the image, giving an error of "error 3194" or "declined to authorize the image". iTunes will communicate with iBoot throughout
SHSH_blob
Mobile operating system by Apple
"chain of trust", bootstrapping to a pwned (no signature check) iBEC, or iBoot to finish the boot process. Since the arrival of Apple's native iOS App
IOS
Partition used by Unified Extensible Firmware Interface
Boot Camp. Custom Apple UEFI firmware named iBoot controls the logic for finding and loading bootloaders. iBoot will select the desired bootloader (potentially
EFI_system_partition
Open source version of Apple's bootloader
OpeniBoot is an open source implementation of Apple's closed source bootloader iBoot. It allows the booting of unsigned code on supported Apple Devices (such
OpeniBoot
Unauthorized release of information online
code given to OEMs to help with writing drivers. In February 2018, the iBoot bootloader for Apple operating systems' source code was leaked onto GitHub
Internet_leak
Removing vendor-installed limitations in tech products
downgrades to earlier, jailbreakable firmware. In an "untethered" jailbreak, the iBoot environment is changed to execute a boot ROM exploit and allow submission
Jailbreak_(computer_science)
Different bootloaders
Official website GRUB4DOS 31 March 2009 GPL-2.0-only Official website iBoot Apple Inc. iBoot-11881.62.2~1 June 29, 2007 December 9, 2024 Proprietary LILO BSD-3-Clause
Comparison_of_bootloaders
Removal of limitations from iOS devices
mandatory for booting is often related to the exploit targeting the device's iBoot process. While untethered jailbreaks find a way to make kernel patches persist
IOS_jailbreaking
Mechanism for passing hardware information
Bootloader (LLB) will load Apple-encrypted devicetree to main memory, then loads iBoot. The coreboot project makes use of device trees, but they are different
Devicetree
Piece of read-only-memory used for booting a computer system
devices, the boot ROM is called "SecureROM" It is a stripped-down version of iBoot. It provides a Device Firmware Upgrade (DFU) mechanism, which can be activated
Boot_ROM
Linux kernel running on devices made by Apple
silicon processors and devices. They can also run it through virtualization. iBoot iOS jailbreaking MkLinux Linux for mobile devices Linux on IBM Z Linux range
Linux_on_Apple_devices
Process of starting a computer
programs or application programs. Some boot loaders, such as Das U-Boot and iBoot, include both first- and second-stage boot functions. Many embedded systems
Booting
Tablet computer developed by Apple (2012)
2012. Retrieved April 8, 2012. O'Grady, Jason D. (February 1, 2012). "iBoot screenshots leak the iPad 3's A6 processor (Rumor)". ZDNet. Archived from
IPad_(3rd_generation)
2010 Apple tablet computer [iPad]
includes the keyboard not showing up). It's also untethered too via the iOS 5 iBoot exploit. (Demonstration of untethered boot is in the video). Do not ask
IPad_(1st_generation)
Security and privacy features of the iOS operating system
finishes its tasks, it runs the higher level bootloader, known as iBoot. If all goes well, iBoot will then proceed to load the iOS kernel as well as the rest
Security_and_privacy_of_iOS
Computer security technique
0x00200000), where 0xRR is a random byte from SHA1 (random data) generated by iBoot (the 2nd-stage iOS Boot Loader). The Linux kernel enabled a weak form of
Address space layout randomization
Address_space_layout_randomization
Startup sequence for Macintosh computers
from previous Macs where it uses a boot ROM located on the SoC to launch iBoot, in a similar manner to that of the iPhone and iPad. In all instances, the
Macintosh_startup
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