.DMG File Recovery

Have files been deleted due to a user’s error or software error? Have you formatted a disk by accident and need to know how to recover the files? Read our .DMG file recovery guide for Windows, MacOS, Android and IOS in 2024.

DMG File Recovery

What is a .DMG file?

A DMG file is a mountable disk image created in macOS. It contains raw block data typically compressed and sometimes encrypted. DMG files are commonly used for macOS software installers that are downloaded from the Internet, which mount a virtual disk on the desktop when opened.

What Are Common Causes of ".DMG" Files Lost or Failure?

There can be several common causes of ".DMG" (Disk Image) files lost or failure. Some of them include:

  1. Accidental deletion: Users may accidentally delete the ".DMG" file while organizing or cleaning up their storage devices.
  2. File system corruption: Corruption in the file system, such as errors in the disk structure or directory, can lead to the loss or failure of ".DMG" files.
  3. Virus or malware attack: If a virus or malware infects the system, it can corrupt or delete files, including ".DMG" files.
  4. Hardware failure: Issues with the storage device, such as a hard drive failure or bad sectors, can result in the loss or failure of ".DMG" files.
  5. Software or system crash: Unexpected system shutdowns, software conflicts, or crashes can cause ".DMG" files to become inaccessible or lost.
  6. Interruptions during file transfer: If there is an interruption during the transfer of a ".DMG" file, such as power failure or network issues, it can lead to file loss or corruption.
  7. Formatting or partitioning errors: Mistakenly formatting or partitioning a storage device can result in the loss of ".DMG" files stored on it.
  8. Human error: Accidental formatting, improper handling of storage devices, or mistakenly overwriting ".DMG" files can cause their loss or failure.

It is important to regularly back up ".DMG" files and use reliable data recovery software to minimize the risk of losing important data.

How to recover lost ".DMG" files?

Sometimes while working with a computer, laptop or other stationary or mobile devices, you may encounter various bugs, freezes, hardware or software failures, even in spite of regular updates and junk cleaning. As a result, an important ".DMG" file may be deleted.

Go to view
🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

🧺 How to Recover Files and Folders After Sending Them to the Recycle Bin and Deleting? (Windows 11)

By no means should you think that the only way to recover a ".DMG" file is always to create it once more.

Use programs for recovering ".DMG" files if a file was lost after accidental or deliberate deleting, formatting the memory card or the internal storage, cleaning the storage device, after a virus attack or a system failure.

Programs to recover ".DMG" files

Looking for a way to get files back? In cases when files were deleted and they cannot be restored by using standard operating system tools, use Hetman Partition Recovery.

The tool recovers data from any devices, regardless of the cause of data loss.

Follow the directions below:

  1. Download Hetman Partition Recovery, install and start the program.

  2. The program will automatically scan the computer and display all hard disks and removable drives connected to it, as well as physical and local disks.

    File Recovery Software
  3. Double-click on the disk from which you need to recover ".DMG" files, and select analysis type.

    Hetman Partition Recovery - Analysis Type
  4. When the scanning is over, you will be shown the files for recovery.

    Hetman Partition Recovery - Files that Can be Restored
  5. To find a file you need, use the program’s interface to open the folder it was deleted from, or go to the folder "Content-Aware Analysis" and select the required file type.

    Hetman Partition Recovery - Deep Scan
  6. Select the files you have been looking for and click "Recovery".

    File Recovery Software - Files List for Recovery
  7. Choose one of the methods for saving the files and recover them.

    Saving recovered files in Hetman Partition Recovery

How to open file with ".DMG" extension?

Looking for how to open a stereo mac OS X Disk Image image file file?

Programs that open ".DMG" files

File Viewer Plus File Viewer Plus
7-Zip 7-Zip
PeaZip PeaZip
Catacombae HFSExplorer Catacombae HFSExplorer
Reincubate DMG Extractor Reincubate DMG Extractor
Apple Disk Utility Apple Disk Utility
Roxio Toast 18 Roxio Toast 18
Incredible Bee Archiver Incredible Bee Archiver
Catacombae HFSExplorer Catacombae HFSExplorer
Catacombae HFSExplorer Catacombae HFSExplorer

Additional Information

  • File type: Mac OS X Disk Image

  • File extension: .DMG

  • Developer: Apple

  • Category: Disk Image Files

  • Format: Binary

  • HEX: 78

  • ASCII: x


We will be happy to answer your questions!

Comments (1)

  • Hetman Software: Data Recovery
    Hetman Software: Data Recovery 18.12.2019 13:20 #
    Leave a comment if you have any questions about Recovering lost .DMG files after deleting, cleaning or formatting!
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Vladimir Artiukh

Author: Vladimir Artiukh, Technical Writer

Vladimir Artiukh is a technical writer for Hetman Software, as well as the voice and face of their English-speaking YouTube channel, Hetman Software: Data Recovery for Windows. He handles tutorials, how-tos, and detailed reviews on how the company’s tools work with all kinds of data storage devices.

Oleg Afonin

Editor: Oleg Afonin, Technical Writer

Oleg Afonin is an expert in mobile forensics, data recovery and computer systems. He often attends large data security conferences, and writes several blogs for such resources as xaker.ru, Elcomsoft and Habr. In addition to his online activities, Oleg’s articles are also published in professional magazines. Also, Oleg Afonin is the co-author of a well-known book, Mobile Forensics - Advanced Investigative Strategies.


Questions and answers

  • What is a .DMG backup file and how is it different from other backup formats?

    A .DMG backup file is a disk image file format used on macOS operating systems. It is similar to other backup formats in that it is used to store a copy of data or system files for backup purposes. However, there are a few key differences that set .DMG files apart:

    1. Disk Image Format: A .DMG file is a disk image, which means it is a sector-by-sector copy of the contents of a storage device, such as a hard drive or optical disc. It includes not only the files but also the file system structure, metadata, and boot information.
    2. Compression and Encryption: .DMG files can be compressed and encrypted to reduce their size and protect the data within. Compression helps save storage space, while encryption ensures the backup is secure and can only be accessed with the correct password.
    3. macOS Compatibility: .DMG files are specifically designed for macOS systems. They are often used for creating backups of the entire system, including the operating system, applications, and user data. This makes it easier to restore the entire system in case of a failure or to transfer the system to a new computer.
    4. Read-Only Access: By default, .DMG files are mounted as read-only volumes, meaning you can access the contents but cannot modify them directly. This helps maintain the integrity of the backup and prevents accidental changes.
    5. Disk Utility: macOS provides a built-in utility called Disk Utility to create, mount, and manage .DMG files. This makes it convenient for users to create and restore backups without the need for third-party software.

    Overall, .DMG backup files offer a comprehensive and efficient way to create backups of macOS systems, ensuring the integrity, security, and compatibility of the backup data.

  • How can I create a .DMG backup file on my Mac computer?

    To create a .dmg backup file on your Mac computer, you can follow these steps:

    1. Open the Disk Utility application. You can find it in the Utilities folder within the Applications folder, or use Spotlight to search for it.
    2. Once Disk Utility is open, click on "File" in the menu bar and select "New Image" and then "Blank Image."
    3. In the "Save As" field, choose a name for your backup file and select the location where you want to save it.
    4. Specify the size you want for the backup file. Make sure it is large enough to accommodate the data you want to backup.
    5. Choose "read/write" from the "Image Format" dropdown menu.
    6. Select "none" from the "Encryption" dropdown menu, unless you want to encrypt your backup file.
    7. Click on "Save" to create the .dmg backup file.
    8. Once the backup file is created, you can double-click on it to mount it as a virtual disk on your Mac. You can then copy files and folders to this virtual disk to create your backup.

    Remember to regularly update your backup files to ensure your data is protected.

  • What are the advantages and disadvantages of using .DMG backup files for data backup and recovery purposes?

    Advantages of using .DMG backup files for data backup and recovery purposes:

    1. Compression: DMG files can compress data, reducing the file size and saving storage space.
    2. Encryption: DMG files can be encrypted, providing an added layer of security for sensitive data.
    3. Integrity: DMG files have built-in checksums to ensure data integrity and prevent corruption.
    4. Versatility: DMG files can store a variety of data, including files, folders, and even entire disk images.
    5. Incremental backups: DMG files support incremental backups, allowing users to back up only the changed or new files since the last backup.

    Disadvantages of using .DMG backup files for data backup and recovery purposes:

    1. Limited compatibility: DMG files are primarily used on macOS, so they may not be easily accessible on other operating systems.
    2. Time-consuming: Creating and restoring DMG backups can be time-consuming, especially for large files or disk images.
    3. Size limitations: DMG files have a maximum size limit (typically around 2TB), which may restrict their use for larger backups.
    4. Lack of versioning: DMG files do not typically support versioning, making it difficult to restore previous versions of files.
    5. Complexity: Working with DMG files often requires technical knowledge, and the process may be more complex for non-technical users.
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