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This iteration would be used for all versions of Classic Mac OS up to Mac OS 9.2.2, the last version of the Classic Mac OS operating system. In all instances, the "Restart" button would be present, which would allow the user to restart the computer from the operating system as the bomb screen typically prevents the user from further using the ...
"About This Computer" Mac OS 9.1 window showing the memory consumption of each open application and the system software itself. Historically, the classic Mac OS used a form of memory management that has fallen out of favor in modern systems. Criticism of this approach was one of the key areas addressed by the change to Mac OS X.
On Apple Mac computers using Intel x86-64 processor architecture, the EFI system partition is initially left blank and unused for booting into macOS. [13] [14]However, the EFI system partition is used as a staging area for firmware updates [15] and for the Microsoft Windows bootloader for Mac computers configured to boot into a Windows partition using Boot Camp.
Typically, the system firmware (UEFI or BIOS) will allow the user to configure a boot order. If the boot order is set to "first, the DVD drive; second, the hard disk drive", then the firmware will try to boot from the DVD drive, and if this fails (e.g. because there is no DVD in the drive), it will try to boot from the local hard disk drive.
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 ...
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. Instead, the Mac's firmware enables its drives to behave as a SCSI, FireWire, Thunderbolt, or USB-C external mass ...
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Apple has come up with a very similar network boot approach under the umbrella of the Boot Server Discovery Protocol (BSDP) specification. BSDP v0.1 was initially published by Apple in August 1999 [9] and its last v1.0.8 was published in September 2010. [10] Mac OS X Server included a system tool called NetBoot. A NetBoot client uses BSDP to ...