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format file dmg

What is a dmg file and how do I open a dmg file?

DMG is a Mac OS X Disk Image file used by its operating system. Opening a DMG mounts the volume in the Finder. Several proprietary disk image formats are used to create them, including Universal Disk Image Format and New Disk Image Format. Apple originally created their disk image formats because the resource fork used by Mac applications could not easily be transferred over mixed networks such as those which make up the Internet. As the usage of resource forks declined with the realease of Mac OS X, disk images remained the standard software distribution format. Disk images allow the distributor to control the Finder's presentation of the window, which is commonly used to instruct the user to copy the application to the correct folder. DMG files can be mounted unto a virtual drive or directly activated to launch the Apple Disk Utility program, in order to peruse and use the content of the .DMG files. Many installer distributions of third party applications for Mac OS X platforms are packaged as virtual disks that are stored in the DMG format, and the virtual disks are distributed as .DMG files. Windows file compression and decompression tools like WinZip, PeaZip and 7-Zip can be used in a Windows-based computer to open and view the content of these DMG files. To open, unzip and double click the file.

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Detail dmg file extension information:
File Type: dmg
File Format: Mac OS X Disk Image
Primary Association: Apple Files
Mime Type: application/x-apple-diskimage