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Repair DMG File Corruption - Inbuilt Hdiutil Terminal Command Line Utility


This article gives an overview about DMG file and provides user with ways to repair DMG file or Disk Image File using Inbuilt Hdiutil Terminal Command Line Utility. This prevents the corruption and damage of Disk Image File and successfully recover DMG File easily.

What is DMG File?

DMG File is a file extension abbreviated for Apple Disk Image. It is a kind of Disk Image developed by Apple for Macintosh OS. This Apple Disk Image can be seen mounted like a volume in the Finder. These files are similar to Windows ISO which mainly contains program installation files specifically for Apple Applications. It supports to hold compressed files as well. The Internet Media Type or MIME Type of DMG Disk Image File is application/x-apple-diskimage. The icon for DMG File is of an internal hard drive as shown below:

restore dmg disk image file

This DMG Disk Image file can be structured according to various Disk Image Formats. Some of the most common formats are:

  • UDIF : Universal Disk Image Format
  • NDIF : New Disk Image Format

Causes for DMG Damage

  • Physical Damage : Since these files are created in disk itself, there are possibilities for scratches and external damage to the disk. This has an adverse affect while you try to open the disk later.
  • Improper Unmounting : Your PC considers DMG File as physical disk. If this DMG File is Stored in a USB or any other external storage and you try eject it before proper process of unmounting you can cause damage to your DMG File.
  • Power Failure Termination : There may be Possibilities of sudden Power failure causing interrupted Mounting or Dismounting of DMG Files. This may result in abrupt termination of files.
  • Read/Write Disruption : Halting during the current Read /write operation may cause the DMG File to get corrupted.
  • Cross-Platform Sharing : Sometimes sharing between the unsupported Platforms may cause the file to become unresponsive. This may be a prime reason for Corruption of files.
  • Virus Attack : Downloading unknown applications and sharing files can the primary reason for Virus attack being spread. These dangerous virus can influence the entire file system and cause the file to become corrupted.
  • Corrupt Header File : Header files contains crucial information for any files that store mass information about that file. Any damage to the Header File may cause the data to become Corrupt and lead to DMG Recovery.
  • Any Hardware or Software Issue : There may be some internal or external Hardware issues that can cause DMG File Corruption.

These are some of the reasons that can cause corruption of DMG Disk Image File. The only way to overcome corruption is to Repair DMG File

Commonly Faced DMG File Errors :

Some of the commonly encountered errors that people face while working with DMG Files are:

  • Error Code: 4960 Failed to Mount Disk Image:This Error Code Appears when you try to Open Disk Image File on your PC.
  • Cannot Open DMG File
  • DMG Not Recognized: No mountable File System
  • Invalid Checksum: DMG Disk Image File
  • Disk Image Could Not be opened
  • Cannot run from read only DMG File.

Manual Method to Repair DMG File

Here are some of the Manual Strategies that may assist you to Repair ZIP File free of cost. Unfortunately, during corruption there is no way that you can reverse this process. You can follow these manual methods to recover DMG File.

Method 1: Back up before DMG Recovery

Before you attempt to restore DMG File, make sure to keep a copy of it. While you may be able to fix DMG File, it can get corrupted. So Take a backup before you attempt to recover DMG File.

Method 2: Repair DMG File with Disk Utility

There are several procedures in Disk Utility that you can attempt to fix corrupt DMG File. Begin with the following steps to repair DMG File

  1. Open the application and move DMG File copy into the devices list.
  2. Select the DMG File and choose First Aid tab in order to start with the the disk verification. If any problem persists, try to recover DMG File.
  3. If there is a still difficulty in Mac file system due to DMG File Error :No Mountable File Systems then you may try this to repair DMG File.
    • Reboot Mac using the Mac Bootable CD/Flash drive and attempt to restart your PC.
    • Click on Install Mac OS X option.
    • Press “C” button on your keyboard continuously.
    • Accept the license agreement & Choose the language you wish to opt.
    • Select the destination drive in which you had problem.Now, Choose Macintosh HD.
    • Select the Options tab to select the installation method. In addition, if you need to secure your personal file folders & user accounts Select the option for Archive to Install & Choose to Preserve Users and Network Settings.
    • Now, try Restarting your system and reply to configuration prompt in oder to repair DMG File.

Method 3 : Convert DMG to ISO

  1. Make use of a Inbuilt command line utility HDIUTIL
  2. Initialize Command Prompt in your system and enter the following command as shown below in the terminal to repair DMG File.

    hdiutil convert /path/abc.dmg -format UDTO -o /path/abcd.iso

    (Note: Replace the path with your DMG File Path.)

Alternative Method

If you are still unable to repair DMG Files with the above mentioned manual procedures. Then the last option is using DMG Recovery Tools that are available on Internet to solve your complications easily.

Conclusion

This articles describes ways to enlighten users with DMG Files used in Mac, various problems & difficulties faced while working with DMG File and How to resolve these real time error faced by users. It will help you resolve all the obstacles by following some manual techniques to repair DMG Files that a normal user can follow with ease.