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  2. Repair permissions - Wikipedia

    en.wikipedia.org/wiki/Repair_permissions

    In systems prior to OS X El Capitan, a permissions repair can be performed by selecting a startup volume and clicking the "Repair Disk Permissions" button in the "First Aid" section of Disk Utility. The operation can also be performed by using the diskutil command-line utility. [ 6 ]

  3. Target Disk Mode - Wikipedia

    en.wikipedia.org/wiki/Target_Disk_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. Instead, the Mac's firmware enables its drives to behave as a SCSI, FireWire, Thunderbolt, or USB-C external mass ...

  4. Disk First Aid - Wikipedia

    en.wikipedia.org/wiki/Disk_First_Aid

    [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.

  5. Power-on self-test - Wikipedia

    en.wikipedia.org/wiki/Power-on_self-test

    The iMac began the production of New World Macs, as they are called; New World Macs, such as the iMac G3, Power Macintosh G3 (Blue & White), Power Mac G4 (PCI Graphics) [broken anchor], PowerBook G3 (bronze keyboard), and PowerBook G3 (FireWire), load the Mac OS ROM from the hard drive.

  6. Disk Utility - Wikipedia

    en.wikipedia.org/wiki/Disk_Utility

    Mac OS X Leopard added the ability to create, resize, and delete disk partitions without erasing them, a feature known as live partitioning. In OS X El Capitan , Disk Utility has a different user interface and lost the abilities to repair permissions due to obsolescence , [ 6 ] create and manage disks formatted as RAID , burn discs, and multi ...

  7. Old World ROM - Wikipedia

    en.wikipedia.org/wiki/Old_World_ROM

    Toolbox then checks for a disk in the floppy drive, and scans all SCSI buses for a disk with a valid System Folder, giving preference to whatever disk is set as the startup disk in the parameter RAM. If a bootable disk is found, the Happy Mac logo is displayed, and control is handed over to the Mac OS.

  8. Click of death - Wikipedia

    en.wikipedia.org/wiki/Click_of_death

    Click of death is a term that had become common in the late 1990s referring to the clicking sound in disk storage systems that signals a disk drive has failed, often catastrophically. [1] The clicking sound itself arises from the unexpected movement of the disk's read/write actuator. At startup, and during use, the disk head must move correctly ...

  9. Macintosh startup - Wikipedia

    en.wikipedia.org/wiki/Macintosh_startup

    Mac OS 8.6 and later include the version number in the splash screen (for example, "Mac OS 9" in big black text). On early Macs without an internal hard drive, the computer boots up to a point where it needs to load the operating system from a floppy disk.

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