一個Macintosh磁盤映像文件在Mac文件系統的鏡像副本,可以安裝在計算機上的虛擬硬盤驅動器。這些Macintosh磁盤映像文件也可以用作虛擬光盤驅動器,如DVD和CD驅動器。 Mac OS 9和舊版本都集成了使用和安裝這些Macintosh磁盤映像文件的支持。這些Macintosh磁盤映像文件保存在IMG格式,並加蓋.IMG擴展。這些IMG文件也存儲與編碼規範和文件壓縮標準專利的蘋果實施。類似於ISO文件,一個IMG文件有時可改變為ISO文件只需更換的.img分機與.iso擴展,並且這樣做將允許用戶使用在IMG文件的Microsoft Windows顯影的圖像安裝程序基於系統。的Mac OS X也實現了與開放的支持和使用這些文件的IMG,雖然較新的磁盤映像文件格式,是目前廣泛使用的編程用於Mac平台的相關應用。
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-tw/file-extensions/dmg">.dmg or for .A href="/zh-tw/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.