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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.
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.
Download QR code; Print/export Download as PDF; Printable version; ... or specific Apple products that do not fall into one of the existing sub-categories. If the ...
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]
Apple IIe Card for the Macintosh LC – Double Exposure; Apple II 3.5" Disk Controller Card – NuMustang; Apple Color OneScanner 600/27 – Rio; Apple Color OneScanner 1200/30 – New Orleans; Beats Flex – B372; HomePod – B238; HomePod Mini – B520; Built-in iSight (2005) – M33; External iSight (2003) – Q8; Lightning Digital AV ...
Those Macintoshes include a ROM chip varying in sizes up to 4 megabytes (MB), [8] which contains both the computer code to boot the computer and to run the Mac OS operating system. The ROM-resident portion of the Mac OS is the Macintosh Toolbox and the boot-ROM part of that ROM was retroactively named Old World ROM upon the release of the New ...
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When a system on a chip (SoC) enters suspend to RAM mode, in many cases, the processor is completely off while the RAM is put in self refresh mode. At resume, the boot ROM is executed again and many boot ROMs are able to detect that the SoC was in suspend to RAM and can resume by jumping directly to the kernel which then takes care of powering on again the peripherals which were off and ...