dmg file makes a new drive appear on your Mac OS X computer, effectively letting you use it as if you had the original media inserted (e.g. You can also browse and extract specific files from DMG images using small shareware utilities such as PowerISO. How to use or extract DMG images contents?ĭMG images are mountable and burnable/clonable onto real media under any Mac OS X version. That is precisely why you should consider making CDR images instead to preserve Mac OS 9 and earlier disk images. which proves to be a double-sided sword when comes to universal support, especially under Mac OS 9. DiskCopy allowed for compression, which is still the case for DMG images but the latter also allows for encryption.
as opposed to the previous default Mac OS disk image format DiskCopy which totally unsafe to copy over anything else than a HFS (Mac) partition. DMG images are safe to store on any partition type, such as Windows (NTFS) and are safe to distribute over FTP, send by email, etc. DMG images have been the default file format for distributing software on the internet for Mac OS X users since the year 2000.
dmg file is a disk image, meaning it's an exact copy (raw block DATA) of a disk (CD, DVD, USB stick, etc.) or even just a folder wrapped in a disk image.
