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  2. Apple Disk Image - Wikipedia

    en.wikipedia.org/wiki/Apple_Disk_Image

    An Apple Disk Image can be structured according to one of several proprietary disk image formats, including the Universal Disk Image Format (UDIF) from Mac OS X and the New Disk Image Format (NDIF) from Mac OS 9. An Apple disk image file's name usually has ".dmg" as its extension. A disk image is a compressed copy of the contents of a disk or ...

  3. Apple Software Restore - Wikipedia

    en.wikipedia.org/wiki/Apple_Software_Restore

    Apple Software Restore. Apple Software Restore or asr is a command line utility in Mac OS X used to apply a DMG disk image to a selected partition or mount point on a file system. It is often used for cloning large numbers of Macintosh computers. Apple Software Restore can read an image locally or from a server via HTTP or its own multicast asr ...

  4. macOS Catalina - Wikipedia

    en.wikipedia.org/wiki/MacOS_Catalina

    macOS Catalina (version 10.15) is the sixteenth major release of macOS, Apple Inc. 's desktop operating system for Macintosh computers. It is the successor to macOS Mojave and was announced at WWDC 2019 on June 3, 2019 and released to the public on October 7, 2019. Catalina is the first version of macOS to support only 64-bit applications and ...

  5. macOS version history - Wikipedia

    en.wikipedia.org/wiki/MacOS_version_history

    macOS. The history of macOS, Apple 's current Mac operating system formerly named Mac OS X until 2011 and then OS X until 2016, began with the company's project to replace its "classic" Mac OS. That system, up to and including its final release Mac OS 9, was a direct descendant of the operating system Apple had used in its Mac computers since ...

  6. Classic Mac OS - Wikipedia

    en.wikipedia.org/wiki/Classic_Mac_OS

    v. t. e. Mac OS (originally System Software; retronym: Classic Mac OS [a]) is the series of operating systems developed for the Macintosh family of personal computers by Apple Computer, Inc. from 1984 to 2001, starting with System 1 and ending with Mac OS 9. The Macintosh operating system is credited with having popularized the graphical user ...

  7. Disk Copy - Wikipedia

    en.wikipedia.org/wiki/Disk_Copy

    Versions of Disk Copy in Mac OS X added support for the newer Universal Disk Format (UDIF) image format, introduced with DMG files in Mac OS X. Although the last official public release of Disk Copy for Mac OS 9 was version 6.3.3, there was to be a version 6.5 that supported OS X's UDIF image format. But because Apple had stopped support for OS ...

  8. macOS High Sierra - Wikipedia

    en.wikipedia.org/wiki/MacOS_High_Sierra

    Apple File System. Apple File System (APFS) replaces HFS Plus as the default file system in macOS for the first time with High Sierra. It supports 64‑bit inode numbers, is designed for flash memory, and is designed to speed up common tasks like duplicating a file and finding the size of a folder's contents. It also has built‑in encryption ...

  9. HFS Plus - Wikipedia

    en.wikipedia.org/wiki/HFS_Plus

    HFS Plus or HFS+ (also known as Mac OS Extended or HFS Extended) is a journaling file system developed by Apple Inc. It replaced the Hierarchical File System (HFS) as the primary file system of Apple computers with the 1998 release of Mac OS 8.1. HFS+ continued as the primary Mac OS X file system until it was itself replaced with the Apple File ...