Open DMG Files with 7-Zip 7-Zip is a lightweight, but powerful compression tool that is free to download. In addition to extracting DMG files, you can use 7-Zip to extract most types of compressed files out there, including ZIP, CAB, ISO, RAR, and WIM, to name just few.
There are times you need to share some sensitive data with associates or mates that you don't want to share to anyone else or leave any possibilities for others to open and read/copy. One possibility would be to use password protected packing like ZIP or RAR. But that wouldn't be flexible in terms of further editing which is why macheads use DMG.
As in the previous DMG-related articles Disk Utility comes in handy. You can find Disk Utility in Applications > Utilities.
On the toolbar of Disk Utility, there's icon for the New Image, clicking on which produces the dialogue box:
As we go through the entries, the specs for the new password protected DMG disk image are following:
- Save As sets the file name of the image file, e.g. My private data.dmg.
- Where sets the location of the image file.
- Volume name sets the name of the volume as it would appear in Finder later
- Volume size sets the estimated size of the DMG file. If you are going to share stuff, you probably know what would the maximum size be. For the document files you'd be safe with 10 MB.
- Volume Format is the disk format for the image that you may safely leave untouched.
- Encryption refers to the file encryption strength as we set the password. 256-bit AES encryption would make a nice choice here.
- Partitions would be fine with Single partition.
- Image Format is best to remain at read/write in order to enable later changes, e.g. if you need to add files into the image in future.
With everything filled in, hitting the Create button will create the image file at your given location and prompt you for the password:
Make sure to uncheck the Remember password in my keychain checkbox if you are willing to be prompted for the password at all times, even on your own machine. Otherwise, if anyone opens the DMG file on the machine it was created on, they would not be prompted for the password because it would be pulled off the Keychain automatically.
As you have created the DMG file, you can open it and drag your sensitive files to it in Finder. Once you have completed, make sure to unmount the image from the eject button by the image name .
Related:
File type: Mac OS X Disk Image
Open DMG File
The usage of the DMG file extension is in the context of a mountable disk image file which is generated by the Mac OS X Operating System platform. Once the file is opened, the system will mount it in a virtual disk located on the user's desktop.
This type of file is normally utilized for the distribution of software installation packages for the Macintosh computer system.
Prior to the introduction of this file format, the Mac environment utilized the IMG up until the introduction of the Mac OS 9. The Apple Disk Utility is the main application associated by users to this particular file type under the Macintosh platform and is bundled with the Mac OS X installation package.
Although not meant to be directly opened under the Microsoft Windows Operating System platform, the DMG format file can be accessed by Windows users by using some third party applications in the market. Basically, the DMG file extension can be compared to the EXE or ISO format of Windows and can even function as a complete virtual drive for the system.
The mimicking of physical CD drives is a workaround implemented by the system to address problems that may arise from CD requirements of some software programs including support for the efficient usage of an organization's resources.
Detailed information
How To Open Dmg Files
