Mac Wont Open Dmg
How to Open Disk Image (DMG) Files That Are Not Allowed on a Mac. If you've got a disk image file (.dmg) that you want to open but can't because you're not an admin, this workaround can help.
I see that your MacBook stopped opening .DMG files after you updated to macOS Sierra. I can imagine it's concerning to have something not work like it did on a previous operating system. I'm happy to help assist you in finding the best resolution.
macOS should read these files and you should be able to open them fine with no issues, so I would suggest doing a fresh restart of your computer to see if that helps.
If you still have an issue after that, try a backup of your Mac's important data and a reinstall of macOS using the following articles:
Use Time Machine to back up or restore your Mac
How to reinstall macOS
Please let us know if this helps.
Have a great day!
Oct 17, 2016 11:29 AM
DMG is a file of Apple Disk Image. The Apple Disk Images are disk image files commonly used by the Mac OS X operating system. When opened, an Apple disk image is 'mounted' as a volume within the Finder. Several Apple proprietary disk image formats can be used to create these images, including the Universal Disk Image Format (UDIF) and the New Disk Image Format (NDIF). Apple disk images usually have the .dmg file extension.
Apple disk images allow secure password protection as well as file compression and hence serves both security and file distribution functions; they are most commonly used to distribute software over the Internet.
Universal Disk Image Format (UDIF) is the native disk image format for Mac OS X. Disk images in this format typically have a .dmg extension. New Disk Image Format (NDIF) was the previous default disk image format in Mac OS 9, and disk images with this format generally have a .img (not to be confused with raw .img disk image files) or .smi file extension. Files with the .smi extension are actually applications that mount an embedded disk image, thus a 'Self Mounting Image', and are intended only for Mac OS 9 and earlier. A previous version of the format, intended only for floppy disk images, is usually referred to as 'Disk Copy 4.2' format, after the version of the Disk Copy utility that was used to handle these images. A similar format that supported compression of floppy disk images is called DART. Apple disk image files are published with a MIME type of application/x-apple-diskimage.
Different file systems can be contained inside these disk images, and there is also support for creating hybrid optical media images that contain multiple file systems. Some of the file systems supported include Hierarchical File System (HFS), HFS Plus, File Allocation Table (FAT), ISO9660 and Universal Disk Format (UDF).
Open/Extract DMG File on Windows
Easy 7-Zip opens/extracts DMG file easily on Windows. The Easy 7-Zip was developed based on 7-Zip. 7-Zip is a famous open source file archiver. The Easy 7-Zip is an easy-to-use version of 7-Zip. The open source freeware keeps all features of 7-Zip and adds a few useful features that makes the software more user-friendly.
Easy 7-Zip works on Windows 10/8.1/8/7/Vista/2008/2003/XP/2000 (both 32-bit and 64-bit compatible).
- Free Download Easy 7-Zip
- Install Easy 7-Zip by step-by-step instructions
- The installation will associate DMG with Easy 7-Zip automatically
- Double-click on DMG file to open DMG file with Easy 7-Zip
- Alternatively, Right-click on DMG file on Windows Explorer
- Done
You will see files or folders within the DMG file then, click button Extract to extract the DMG file.
And then, choose Extract files.., Extract Here, or Extract to 'folder' to extract the DMG file.
Easy 7-Zip Download Links:
You can install and use other alternative freeware that opens/extracts DMG file without burning the DMG file to disc. For example:
- Free DMG Extractor
- HFSExplorer
- PeaZip
Open/Extract DMG File on Mac
B1 Free Archiver opens/extracts DMG file on Mac. B1 Free Archiver is a free software for creating archive folder and extracting archive file. B1 Archiver works on all platforms - Windows, Linux, Mac and Android. The freeware supports most popular formats including DMG.
B1 Free Archiver is compatible with:
- Mac OS X 10.9 Mavericks
- Mac OS X 10.8 Mountain Lion
- Mac OS X 10.7 Lion
- Mac OS X 10.6 Snow Leopard
Mac Dmg Downloads
Alternative freeware that opens/extracts DMG file on Mac.
- Apple Disk Utility
- Keka
- GUI Tar
Open/Extract DMG File on Linux
You can use command mount to mount DMG file as a virtual drive.
First, you must login as a root user, and then create a directory for DMG image
(Optional) If you're unable to connect to Adobe's servers, select Fix Host File from the table to repair your host files, and then click Cleanup Selected. The Cleaner Tool creates a backup of the hosts files (named hostsbkup) in the same directory, which you can revert to if a problem occurs. (Click Clean All to clean up all installer-related files for the option you chose in step c.)Similary, to clean up CoreSync, first ensure that you have selected All in the pop-up menu. Then select CoreSync from the list and click Cleanup Selected. /mac-cleaner-uninstall.html. . From the table, select the app you want to clean up, and then click Cleanup Selected.
| # mkdir -p /mnt/macimage |
Use mount command as follows to mount DMG file called image.dmg:
| # mount -o loop -t hfsplus image.dmg /mnt/macimage |
If the DMG is HFS file system, use:
| # mount -o loop -t hfs image.dmg /mnt/macimage |
Change directory to list files stored inside an DMG image:
| # cd /mnt/macimage # ls -l |
Magiciso
Unmount the DMG image, type:
| # umount /mnt/macimage |
Alternatively, you can use p7zip to extract the DMG file. p7zip is the Unix command-line port of 7-Zip, a file archiver that archives with high compression ratios.
Install p7zip-full on CentOS and Fedora
| # yum install p7zip-full |
Install p7zip-full on Debian and Ubuntu
| $ sudo apt-get install p7zip-full |
List directories and files in DMG file
| $ 7z l image.dmg |
How To Open Dmg File
Extract DMG file on Linux
| $ 7z x image.dmg |