This is the name that appears in the Finder, where you save the disk image file before opening it. Enter a file name for the disk image, add tags if necessary, then choose where to save it. As a disk management tool for Mac, you can also use it to create a disk image for Mac. It is used for Mac users to erase, format, and mount disk. On a Mac computer, there is a tool called Disk Utility. On macOS, the format of the disk image is. Disk images come in many formats, so they can be used on different kinds of computers, including Windows, macOS, and Linux. It can be used for backup purposes or to save space by storing only one copy of large files that are used infrequently. When you double-click a disk image (or use Disk Utility to open it), Mac OS X uses the contents of the image as the data for a disk that it mounts into the filesystem, which shows up in the Finder as shown in Figure 9-11 Figure 9-12 shows the same disk image in Disk Utility.A disk image is an exact copy of a disk or a partition. UDIF allows the storage of the same partition tables, disk drivers, and volumes found on physical disks, which lets disk images serve as intermediaries in the duplication of any kind of disk, including CDs and DVDs.īeyond their origin as a disk duplication format-and because of their ease of use-disk images are used by many software vendors, including Apple, as a distribution format instead of. Originally created to store the block-for-block contents of a floppy disk for ease of duplication, the disk images created and used by Mac OS X are based on a format called Universal Disk Image Format (UDIF). dmg extension) have become a frequent part of life on Mac OS X.
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