How to Convert ISO to DMG? Complete Guide

  Amit Patra
Written By Amit Patra
Anuraag Singh
Approved By Anuraag Singh  
Modified On October 9th, 2025
Reading Time 5 Minutes Reading

Summary: Convert ISO to DMG is a popular search term for users looking to change disk image formats in various operating systems. Frequently, it is the case that users want to convert or move data in one format to another for compatibility purposes, backups, or system installs. This post will take you through what makes you do this conversion, manual methods to convert, and a trusted professional utility which will make the process smooth.

Reasons to Change ISO to DMG

There are crucial points why users want to convert ISO to DMG. Let’s see those factors:

  • DMG files are native in Mac OS and used in terms of app installation and creation of a disk.
  • It is useful for preparing a bootable installation USB, system recovery CD, or DVD without using a physical disc.
  • Developers & IT companies choose DMGs as the format to develop software in.
  • This is because DMGs support compression and encryption. So, it ensures that your software remains secret until it’s ready.
  • DMG images can take advantage of rich Mac file system features and metadata. providing fine control over disk image structure and access permissions.

Convert ISO to DMG Files Using Manual Steps

There are a couple of ways you can change ISO to DMG, through built-in options available for macOS. Here are some of the methods:

#1. Using macOS Disk Utility 

If you are working directly on a Mac itself, Disk Utility will give you an easy way to do the conversion:

  1. Open Disk Utility on Mac.
  2. Go to File > New Image > Convert.
  3. Navigate to and choose the ISO file.
  4. Optionally, select the desired output format as “Compressed” or “Read/Write”.
  5. Lastly, choose the image format as DMG and click Save.

The process to convert ISO to DMG is done. Now, it can be used to mount in macOS.

#2. Through Terminal Command on Mac

For advanced macOS users, you can convert ISO to DMG directly in the command line.

1. Open Terminal from Applications → Utilities.
2. Enter the following command:

hdiutil convert /path/to/yourfile.iso -format UDRW -o /path/to/output.dmg

3. Replace /path/to/yourfile.iso with the actual ISO path. And, where you want to save the dmg file.
4. When it’s done, you’ll have your ISO file available as a DMG.

Note: It might take longer to convert based on file size and disk speed.

ShortComings During Manual Conversion

These are the points which users generally face while following manual steps. It comes with certain drawbacks:

  • Command line may probably need some technical skill and might lead to human errors.
  • It is usually not supported, if you process ISOs in bulk or customize the type of output.
  • Huge ISO files will either take time to process, or lead to compatibility issues.
  • While manual methods don’t provide other features such as compression, encryption, to set output paths.
  • Plus, these steps do not ensure you a bootable and fully operational DMG image based structure of an ISO file.

Convert ISO to DMG Format – Smart Alternative Method

Manual techniques could work, but would also need technical knowledge and going to involve a lot of trial and error. Using SysTools ISO converter Tool is the go-to solution which is speedy, effective and accurate conversion mode. There is no command line and complicated setting here. All you have to do is load the ISO file, choose the output profile and get started.

Key Advantages:

  • You can handle multiple ISO files at one time with just one process.
  • The ISO to DMG converter keeps the original table structure, data and index. So, there is data loss.
  • Support Windows and Mac OS and time saving methods. You can easily switch between up to 3 devices.
  • Supports all sizes of disk images and is very optimal.
  • 24/7 customer support to help resolve any installation or file conversion issues.

It provides superior quality results compared to manual approach and it is easy to use for both individuals and organizations.

Change ISO to DMG File – Software Method

Follow these tool steps to know the functionality in order to complete the conversion process:

1. Download & Install ISO to DMG converter on your desktop.
2. To insert .iso files, click the Add File(s) button.
3. You can add more than one ISO at the same time. Go to that particular folder, click on the Open button.
4. Simply, press Next and it will convert ISO to DMG format in quick time.
5. Then, it will give you the option to export such as convert ISO to 7Z, BIN/CUE, IMG ZIP-ISO.
6. Browse to the location where you want to save your data. Then, hit the Convert button.
7. Your file is converted into a DMG. Just hit the OK button.
8. And if you want an overall report of this conversion, tap the “View Report option.
9. Now, move to the folder location to see your Excel data.

Concluding Words

If you want your disk image to work on macOS, you need to convert ISO to DMG. You can do it yourself, by using Disk Utility or Terminal, but that may be difficult with large or complex ISO files. In that case, you can opt for our professional solution. It guarantees the complete safety of your data during conversion and is ideal for both professionals and regular users.

  Amit Patra

By Amit Patra

An adept expert with an extensive experience in solving a wide range of technical challenges. Passionate about emerging technologies, creating practical solutions, and simplifying complex concepts in layman's terms for users. Skilled in cybersecurity, data management, cloud platforms, and other domains, with proven expertise in providing user-focused content. His insights are a blend of hands-on experience, research and continuous learning.