Macos Dmg To Iso

  • Jul 14, 2021 The popular DMG format converter, dmg2img, is the best tool to get the job done. The steps below will help you with how to convert DMG to ISO on Windows using this tool. Step 1: Acquire dmg2img and begin DMG to ISO conversion. The first step involves downloading the DMG to ISO converter, dmg2img, and installing it into your computer.
  • Typically, the ISO file system is dominant on the windows platform. As a matter of fact just like the DMG format, it is the default disc image as well as OS compression format, the same is for the ISO on Windows. This being the case, the majority of the software in this category run on the Windows platform. Convert DMG files to ISO for Windows.
  • Select the.iso/.dmg file you want to burn to disc, and click on the Burn button. A dialog box confirming the destination (your blank CD/DVD) will appear, as shown: G/O Media may get a commission.

Here are ways that you can convert dmg files to iso files on Mac OSX, Windows and Linux.

Before we start, let’s download a dmg file from the public domain. I found one on Apple’s article about The XMLHttpRequest Object website while I was learning Ajax and that can be downloaded from this link. This is just a 150KB dmg file and will be handy if you want to have something to test with while you’re following this tutorial.

How To Convert DMG Files To ISO Files On Mac

Method 1: Using the Mac terminal

1. Open a terminal window from Finder > Applications > Utilities > Terminal.

2. Assuming that you have a disk image called apple.dmg in the current directory, type

hdiutil convert apple.dmg -format UDTO -o apple.iso

These are instructions on how to convert a DMG image file to an ISO image file using Mac OS X Terminal. You may want to do this if you need to burn a DMG image using a Windows or Linux operating. Tips: After downloading macOS Catalina.dmg file, it is time to make a macOS bootable USB from it. For this purpose, you can give a try on UUByte DMG Editor, one of the most popular software to create a Catalina USB installer on both Windows PC and Mac.

3. This will actually create a file called image.iso.cdr in the current directory (even though we asked for the output to be image.iso). This file can be safely renamed to image.iso, copied to a Windows server or machine, and burned with your CD/DVD burner of choice.

Generally, the command hdiutil can be used this way:

hdiutil convert /path/to/filename.dmg -format UDTO -o /path/to/savefile.iso

Method 2: Using DMGConverter (freeware)

Macos dmg to iso windows

1. DMGConverter is a disk image (.dmg, .cdr, .iso) creation and conversion tool which is simple and easy to use. It is a very useful tool for the collective processing of more than one file and every folder, and it can deal with all the fundamental processing with the drag & drop of the file/folder. For Mac Only.

How To Convert DMG Files To ISO Files On Windows

This is for Windows users who might have downloaded a dmg file and wondering how to extract the content, or not even knowing how and what to do with the dmg file. I’ve been there at a certain stage. the sharewares mentioned are fully functional and allows you to use the “convert dmg to iso” function even when it’s not registered yet.

Method 1: Using MagicISO (shareware)

1. Download MagicISO, install and run program.

2. Click to open dmg file.

3. Click to open “Properties” dialogs.

4. Uncheck Apple HFS and Apple HFS+

5. Check “ISO 9660” “Joliet” “UDF”

6. Click OK

7. Click to save as to iso image, or click to burn to CD/DVD without saving.

Method 2: Using UltraISO (shareware)

Convert Macos Dmg To Iso

UltraISO basically does the same thing, but it can save you time from doing step 3 to 6 compared to method 1.

Alternative Solutions: dmg2iso (freeware) and isobuster (shareware)

I’ve heard and read that some people had been able to convert dmg files into iso files using dmg2iso (freeware). I’ve tried dmg2iso, converted my dmg file to iso without problem, but the converted iso file is corrupted and can’t be open by any tools (Daemon Tools, Alcohol, MagicISO, UltraISO and ISOBuster) that I’ve tested. It might work for you, but no guarantees.

ISOBuster is pretty similar to MagicISO and UltraISO. But too bad that the function to “convert dmg to iso” is restricted and won’t be functional until you buy the software.

How To Convert DMG Files To ISO Files On Linux

Free open-source app AcetoneISO provides a great deal of disc image manipulation tools not found in the Gnome desktop. It can mount/unmount a variety of image formats (ISO, DMG, MDF, NRG, BIN, NRG), convert images, create, encrypt, and decrypt ISOs, play DVDs (with the required codecs installed), and much more. It is particularly useful for mounting proprietary formats found in Windows and Mac boot discs. AcetoneISO is a one-stop-shop for all of your CD/DVD image manipulation needs, and is a free download for Linux only. This works on all famous linux distro such as Ubuntu, SUSE, Fedora, Mandrake, and Redhat.

So there you have it, and this should get you covered no matter what operating system you’re using.


In the post, we will learn How to Convert macOS Big Sur Installer to ISO. We recently discussed How to Create macOS Big Sur Bootable Installer for Clean Installation: 2 Easy Steps (MAC only) that might have helped you to create a macOS Big Sur Bootable USB.


Advanced Mac users get the freedom to convert macOS Big Sur Installer to ISO file. Normally, the resulting installer ISO file is utilized to install macOS Big Sur on Virtualbox and install macOS Big Sur on VMWare.

This tutorial will walk through the steps of How to Convert macOS Big Sur Installer to ISO.

In this specific walkthrough, we will Convert macOS Big Sur Installer to ISO.

You can also read: How to Speed Up macOS Big Sur? 7 Easy Methods

How to Convert macOS Big Sur Installer to ISO

Macos Dmg To Iso

Step 1: Download the macOS Big Sur Installer file from AppStore. You can simply follow this link and download the macOS Big Sur installer file (.app file).

Step 2: After the download is complete, do not proceed to install the macOS. Instead, close the installer and go to your application and look out for the installer file.

NOTE: The files must be present in your application folder to proceed with this tutorial.

Step 3: Now open you launchpad, and click Terminal.

Step 4: Execute the following commands one by one.

Mac Os Dmg Download

Create an empty Big Sur DMG image using the following command:

Next step is to mount the created Big Sur DMG disk image:

Now use createinstallmedia command to create the macOS Big Sur installer application on the mounted volume:

When createinstallmedia has finished, next you can unmount the volume you just created:

Now we convert the DMG disk image file to an ISO disk image file (technically a CDR file but it’s the same as an iso)

Finally, we rename the Big Sur CDR file extension to Big Sur ISO to convert the CDR to ISO:

Now you can see the macOS Big Sur ISO file on the desktop as shown in the snapshot.

Incase you want to remove the temporary file you can use the following command:

This is not a compulsory step, and the temporary file is removed automatically after some time.

Conclusion: How to Convert macOS Big Sur Installer to ISO: 4 Step Easy Guide

You can also use this guide How to Convert Bootable ISO File to Virtual Disk VHD/VMDK: 2 Way Guide and directly use them on your virtual systems.

Now, this macOS Big Sur ISO file can be used as a bootable disk, or you can directly use it on any virtual system like VMWare and VirtualBox.


Related: How to Create macOS Big Sur Bootable Installer for Clean Installation: 2 Easy Steps (MAC only)

Remember: In most cases, the ISO file that you have generated can only be used to run on Virtual Systems like Virtualbox and VMWare. They might not always work to create a bootable disk.

You can also refer to my post- How To Create macOS Big Sur Bootable USB on Windows: 4 Easy Steps (+Video Tutorial) if you are using a Windows system.

I hope this article has helped you to Convert macOS Big Sur Installer to ISO.

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