MAC 用的，PC 上可以用 dmg2iso、IsoBuster Data Recovery Tool
這 2 個程式開啟。


Extension: DMG
Program and/or Extension Function Company
Macintosh OS X Disk Copy Disk Image File Apple Computer, Inc.
Specific Notes
Treated like a real disk. Can be created with Disk Copy, burnt to CD or mounted as a normal volume. The dmg2iso program will convert a .DMG file to an .ISO file which can then be burned to a CD or read using an .ISO file reader. Note: You have to run the dmg2iso program at a command prompt using the same command as listed on the site for the Perl version, substituting .EXE for .PL in the command. DMGs can be password-protected and, if so, may not be mountable by some software. The DMG file also comes in different formats: HFS, HFS+, UFS, ProDOS, Linux, and Fat32 and so may also require special mounting software to account for the format. IsoBuster can interpret these files directly.

MIME Type File Classification Associated Links
dmg2iso
IsoBuster Data Recovery Tool