Something happened with Macintosh device, the DMG file which was mounted before without problem cannot be mounted anymore. Several day ago it was OK, I installed several updates, rebooted my Mac couple of times and now something that worked before was rejected. The same result “no mountable file systems” I got when I double clicked on DMG file on Finder windows or when I executed hdiutil command:
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No Mountable File Systems Dmg Mac Fix
Dmg - no mountable file systems on MacOS Mojave 10.14.4. After downloading the dropboxinstaller.dmg from the website I recieve a warning dialogue box stating the disk image could not be openend because of no mountable file system. 'No mountable File System' After this error message, the file become inaccessible along with all its data. In order to access data from the file, you need to find out the cause of this problem and perform Mac File Recovery by sorting it out. Mount- It is the process of making computer file system ready to use. After mounting the drive or DMG file, it's contents can be accessed.
# hdiutil mount foo.dmg hdiutil: mount failed – no mountable file systems |
I checked other DMG files downloaded from Internet, for example Skype-8.30.0.50.dmg. The mounting of Skype DMG worked fine. My problematic DMG file was created on Linux machine by genisoimage util and 7zip utility shows that it has ISO type, not HFS type as Skype DMG. The same I could see before when this DMG was mounted successfully with diskutil command:
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# diskutil info /dev/disk4 Device Identifier: disk4 Device Node: /dev/disk4 Whole: Yes Part of Whole: disk4 Device / Media Name: Disk Image Volume Name: Foo Content (IOContent): None OS Can Be Installed: No Disk Size: 25.3 MB (25337856 Bytes) (exactly 49488 512-Byte-Units) Volume Total Space: 25.3 MB (25337856 Bytes) (exactly 49488 512-Byte-Units) Read-Only Media: Yes Device Location: External Virtual: Yes |
So it looked that the problem with file systems, my Mac did not supported ISO 9660 (CDROM) file system anymore.
The first of all I checked all loading file system kernel extensions and I did not find anything related to ISO 9660:
# kextstat | grep filesystem 66 1 0xffffff7f81b91000 0x8000 0x8000 com.apple.filesystems.hfs.encodings.kext (1) 7CC455ED-D7F1-3AD4-B362-4A974AFD0991 <7 6 5 4 3 1> 67 0 0xffffff7f81b99000 0x67000 0x67000 com.apple.filesystems.hfs.kext (407.1.3) F1CDFC19-49BF-35BC-8038-B82DF8C30BDE <66 7 6 5 4 3 1> 109 0 0xffffff7f81d1f000 0x9000 0x9000 com.apple.filesystems.autofs (3.0) 6B23747D-D072-3862-9DC1-A56D7E0185DB <108 7 6 5 4 3 1> |
Then I verified if the kernel extension which supports ISO 9660 (cd9660) existed:
# ls /System/Library/Extensions/ | grep 9660 cd9660.kext |
So it was there. I decided to load it manually:
# sudo kextload /System/Library/Extensions/cd9660.kext |
Then I checked again the list of file system kernel extensions:
# kextstat | grep filesystem 66 1 0xffffff7f81b91000 0x8000 0x8000 com.apple.filesystems.hfs.encodings.kext (1) 7CC455ED-D7F1-3AD4-B362-4A974AFD0991 <7 6 5 4 3 1> 67 0 0xffffff7f81b99000 0x67000 0x67000 com.apple.filesystems.hfs.kext (407.1.3) F1CDFC19-49BF-35BC-8038-B82DF8C30BDE <66 7 6 5 4 3 1> 109 0 0xffffff7f81d1f000 0x9000 0x9000 com.apple.filesystems.autofs (3.0) 6B23747D-D072-3862-9DC1-A56D7E0185DB <108 7 6 5 4 3 1> (1.4.4) 11FD858B-5656-30B0-9C57-C94ECB94155D <7 6 5 4 3 1> MacOSxHghSierra:Downloads root# sudo kextload /System/Library/Extensions/cd9660.kext |
No Mountable File System Dmg Mac
Now cd9660.kert was presented. I tried for mount my foo.dmg file agent and it was successful:
# hdiutil mount foo.dmg /dev/disk4 /Volumes/Foo |
Being a Mac users, you might be hear about DMG file. It generally stands for Disk Mount Graphics. As the name suggest disk mount means by using this file system you can easily be able to manage and mount your entire file system like a normal hard drive partitioning. Furthermore, it also provide the facility to compress the created mac volume and its data. Beside that, it even allow its users to protect their Mac volume with a powerful set of password so that unauthorized users are unable to view the stored data.
But, sometime it has also be seen that users fails to mount their hard drive or the mounted drive gets crashed. As a result, users fails to access their stored Mac volume data and start getting panic. Wait that not the end, users also reported several sorts of error messages when they try to access unmounted file system like “DMG no mountable file system error.” Such sort of circumstance may emerges because of faulty or missing index framework, when you endeavor to mount DMG file that is not recover by the working framework or OS in a legitimate arrangement. Further, virus infection, hardware or software crash are also be the probable reasons behind the occurrence of mac dmg error no mountable file system.
However, to avoid such cumbersome situation several sorts of disk utility are easily available but working on them might need some sorts of technical knowledge. Thus, it is better to opt for some effective and reliable third party recovery software. Have you any knowledge of recovery tool? Does it Work? If no, then wait and just continue your reading. As here available one of the best recovery option for you.
Mac File Recovery: A Best and Reliable Tool
Mac file recovery software is an effective tool that work well in all problems related to Mac and easily able to fix no mountable file system error. Apart from that, the tool also perform through scanning of your entire hard drive and restore all your lost Mac files easily. Further, its smooth recovery option along with exceptionally intuitive graphical client interface permit even a non specialized user to utilize it effectively. Moreover, Mac file recovery software is outfitted with read-only which helps to pretend the recovery process without changing the integrity of the original data.
User Guide
Step 1: Download & Install Mac file recovery software.
Step 2: Afterward, launch it and follow the screen instruction.
Step 3: Select “partition Recovery” option to retrieve lost data.
Step 4: Now, click on Next button.
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Step 5: Save the recovered file at the desired location.
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