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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 as Linux kernels). It also allows to download and install the Android operating system on iPhone , iPad and iPod Touch .
Apple Inc.'s MFi Program, referring to "Made for iPhone/iPod/iPad", is a licensing program for developers of hardware and software peripherals that work with Apple's iPod, iPad and iPhone. The name is a shortened version of the long-form Made for iPod , the original program that ultimately became MFi.
For iPhones, iPads and Apple silicon-based Macs, the boot process starts by running the device's boot ROM. On iPhones and iPads with A9 or earlier A-series processors, the boot ROM loads the Low-Level Bootloader ( LLB ), which is the stage 1 bootloader and loads iBoot; on Macs and devices with A10 or later processors, the boot ROM loads iBoot.
Linux can be dual-booted on Macs that use Motorola 680x0 processors [5] (only 68020 and higher, [5] and only non-"EC" processor variants since an MMU is required [6]).The Linux/mac68k community project provides resources to do so, [7] [8] and an m68k community port of the Debian Linux distribution is also available.
On iPhone, iPad, Apple Watch, iPod Touch, and Apple TV devices, the boot ROM is called "SecureROM" [8] It is a stripped-down version of iBoot. It provides a Device Firmware Upgrade (DFU) mechanism, which can be activated using a special button combination.
The technology used is similar to ARM's TrustZone/SecurCore but contains proprietary code for Apple KF cores in general and SEP specifically. It is also responsible for generating the UID key on A9 or newer chips that protects user data at rest. [citation needed] It has its own secure boot process to ensure that it is completely secure.
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[3] [4] The flashlight feature is only available on iPhone and iPod Touch, and iPad Pro. Beginning with iOS 9.3, a Night Shift toggle became available through the Control Center on all iPhone, iPod Touch and iPad models that have an Apple A7 chip or later.