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A Happy Mac is the normal bootup (startup) icon of an Apple Macintosh computer running older versions of the Mac operating system. It was designed by Susan Kare in the 1980s, drawing inspiration from the design of the Compact Macintosh series and from the Batman character Two-Face . [ 10 ]
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 ...
POST routines are part of a computer's pre-boot sequence. If they complete successfully, the bootstrap loader code is invoked to load an operating system . In IBM PC compatible computers, the main duties of POST are handled by the BIOS or UEFI .
A modern PC is configured to attempt to boot from various devices in a certain order. If a computer is not booting from the device desired, such as the floppy drive, the user may have to enter the BIOS Setup function by pressing a special key when the computer is first turned on (such as Delete, F1, F2, F10 or F12), and then changing the boot order. [6]
These were a common sight, and Mac users of the era might need a paper clip(if the Programmer's Key wasn't installed) in order to restart the computer since the onscreen restart button would usually be nonfunctional.
[3] [4] [5] Disk First Aid is located in Applications:Utilities:Disk First Aid. [4] The classic Mac OS provides an option to run Disk First Aid on startup, although it has been reported that it provides little gain and sometimes can amplify a problem. [4] Its capabilities were incorporated into Disk Utility in macOS.
The Macintosh contained a single 400 KB, single-sided 3 + 1 ⁄ 2-inch floppy disk drive, with no option to add any further internal storage, like a hard drive or additional floppy disk drive. The system software (Mac OS) was disk-based from the beginning, as RAM had to be conserved, but this "Startup Disk" could still be temporarily ejected.
The boot partition (or boot volume) [5] is the disk partition that contains the operating system folder, known as the system root or %systemroot% in Windows NT. [6]: 174 Before Windows 7, the system and boot partitions were, by default, the same and were given the "C:" drive letter.