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Apple G3 iMac booted in Target Mode. Target Disk Mode (sometimes referred to as TDM or Target Mode) is a boot mode unique to Macintosh computers.. When a Mac that supports Target Disk Mode [1] is started with the 'T' key held down, its operating system does not boot.
iBoot is the stage 2 bootloader for iPhones, iPads, Apple silicon-based Macs, and the T2 chip in Intel-based Macs with such a chip. [3] [4] Compared with its predecessor, iBoot improves authentication performed in the boot chain. [2] For Intel-based Macs with a T2 chip, the boot process starts by running code on the T2 chip from the boot ROM.
It also allows editing the size of each control (With exceptions being the volume and brightness sliders, among others) using a "wiggle mode" similar to editing the iPhone and iPad Home Screen. There is also a small "+" button in the top left that allows for opening the controls gallery and adding more controls, including 3rd-party controls for ...
An Apple PowerBook 180c displaying the Happy Mac during the startup process. In all instances, the startup chimes will be heard upon completion of the boot process (if successful), and a Happy Mac (or the Apple logo on newer versions) will be displayed on the screen to visually indicate that no hardware issues were found during the boot process.
A storage controller for the computer's solid-state drive, including always on, on-the-fly encryption and decryption of data to and from it. [4] [9] [10] The T2 is integral in the boot sequence and upgrading of operating systems, not allowing unsigned components to interfere. [4] [8] [9] [10]
The host Macintosh requires special emulation software (a boot disk) launched from System 6.0.8 to 7.5.5 in order to activate the IIe Card. Apple II mode runs only in full-screen (a windowed mode is not possible) and all Macintosh operations are suspended while running, as the IIe card takes over the host computer.
Mac OS X booting up in single-user mode. In PowerPC-based Macintoshes, the boot process starts with the activation of BootROM, the basic Macintosh ROM, which performs a Power On Self Test to test hardware essential to startup. [4] On the passing of this test, the startup chime is played and control of the computer is passed to OpenFirmware.
The Apple–Intel architecture, or Mactel, is an unofficial name used for Macintosh personal computers developed and manufactured by Apple Inc. that use Intel x86 processors, [not verified in body] rather than the PowerPC and Motorola 68000 ("68k") series processors used in their predecessors or the ARM-based Apple silicon SoCs used in their successors. [1]