一个Macintosh磁盘映像文件在Mac文件系统的镜像副本,可以安装在计算机上的虚拟硬盘驱动器。这些Macintosh磁盘映像文件也可以用作虚拟光盘驱动器,如DVD和CD驱动器。 Mac OS 9和旧版本都集成了使用和安装这些Macintosh磁盘映像文件的支持。这些Macintosh磁盘映像文件保存在IMG格式,并加盖.IMG扩展。这些IMG文件也存储与编码规范和文件压缩标准专利的苹果实施。类似于ISO文件,一个IMG文件有时可改变为ISO文件只需更换的.img分机与.iso扩展,并且这样做将允许用户使用在IMG文件的Microsoft Windows显影的图像安装程序基于系统。的Mac OS X也实现了与开放的支持和使用这些文件的IMG,虽然较新的磁盘映像文件格式,是目前广泛使用的编程用于Mac平台的相关应用。
Apple Disk Utility is developed for performing tasks of disks on Mac computers, specifically Mac OS X. This means that this disk utility software is designed by Apply for their very own computers. There are different tasks and functions this tool provides which can be accessed from the command line of Mac OS X with the hdiutil commands and diskutil commands. Among the tasks of this disk utility product are the following: creating, conversing, compressing and encrypting of disk images from file formats supported to .A href="/zh-cn/file-extensions/dmg">.dmg or for .A href="/zh-cn/file-extensions/cdr">.cdr (CD and DVD) images; mounting or unmounting and ejecting of all variety of disks; enabling or disabling of journaling; verifying permissions and disk’s integrity with repair tool; as well as erasing, formatting, cloning and partitioning of disks. Other than these tasks, Disk Utility also has functions to check the S.M.A.R.T status of a hard disk drive, burn disk images to CDs and DVDs (HFS+ format type), erase CDs and DVDs that are rewritable, restore volumes from ASR images, merge, create, destroy or repair sets of RAID, and secure free space or disk that is deleted.