Macos Dmg To Bootable Usb

Posted : admin On 12/28/2021
  • Oct 24, 2011  This recipe will explain how to make a USB Thumb Drive bootable with the OS X Lion Developer Preview installer on it and in turn allow you to install Lion on a Mac without an optical drive (ie Macbook Air line). We will need a copy of the installer dmg (not provided) and a 4GB.
  • How to make a bootable macOS installer. Your looking to create an installation of one of the ‘Cat’ versions of Mac OS X you should read this older. Drive a name such as 'macOS' or 'USB.
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Make a bootable macOS Catalina USB flash drive to install macOS on Apple computer or for Hackintosh purpose. If you don't have a MAC or for other reasons can't access MAC make a Catalina USB using Windows 10. Jul 29, 2017  Quick Guide on how to make a Mac OS Bootable Pendrive on your Windows or Mac Computers Download #TransMac from: Follow us on Social Med. In this article, I am going to show you how to create bootable USB Installer for macOS Sierra on Windows 10 with TransMac. The article will help you, instead of creating bootable USB installer with UniBest or terminal for macOS Sierra then it will able you to create USB.


A DMG file is Apple's equivalent of an ISO installation file or disk image. It usually contains all the information required to install a program on a Mac computer running Mac OS X or macOS. It is also a container to hold macOS installation image. If you want to create a bootable macOS bootable disk, the first step is to burn DMG to USB or DVD.

However, native support for DMG files is only available on Apple's desktop operating system. For Windows or Linux, you will need to use different methods. For example, if you want to burn a DMG file to USB on a Mac, it's as easy as using the built-in Disk Utility tool. On Linux and Windows, you obviously have to use other ways. This article explains how to burn a DMG file to a USB flash drive on a Mac, a Windows computer and a machine running Linux.

Method 1: How to Burn DMG to USB on macOS or Mac OS X

If you have a Mac, then Disk Utility will help you create your bootable USB drive. Since this is a native application, no downloads are required. The built-in tool will be able to directly burn the DMG file to a disk or drive. You simply have to follow the process as described below:

Step 1: Open Disk Utility by going to Applications >> Utilities and clicking on the tool.

Step 2: You should be able to see all the drive names in the left-side panel. Now open a Finder window and drag your DMG file into Disk Utility. Drop it in the blank area below the drive names on the left panel.

Step 3: You can now insert your USB drive and wait for it to appear in the drives list. Next, click on your mounted DMG file on the left panel and click on ‘Burn' in the top toolbar. When you see the ‘Burn Disk In:' message, click on the USB drive.

The DMG file will now be burned to the USB drive, and you can use it to do program installations. Disk Utility has a good burn success rate, so hopefully you won't have to repeat the process to get it right.

Method 2: How to Burn DMG to USB in Windows 10 (Bootable)

Since Windows doesn't natively support DMG files, you will need to first download and install a utility that can handle such disk images. The best software for the job is WizDMG, a Windows-based desktop solution for authoring Apple's disk image files in a non-Mac environment.

WizDMG requires no technical expertise to use. The clean interface only shows the user the necessary functions, and all the heavy lifting is done at the back end. One of the unique features of this increasingly popular software is the amount of beta testing it has gone through. Extensive and gruelling tests with different storage media brands and Windows versions have made this one of the most reliable DMG utilities for Windows. With one of the industry's highest burn success rates, it's no wonder that WizDMG is emerging as the leader in its class.

Step 1 Install WizDMG

Download WizDMG to your Windows PC and install the program by following the setup instructions in the wizard.

Step 2 Load DMG File into WizDMG

After launching the program, you'll see various options on the home page. Click on 'Burn' to kick off the process. Now click on 'Load DMG' to add the file to the program, and insert a USB flash drive.

Step 3 Start Burning DMG to USB

The drive will be automatically detected by the software, so all that's left is to click on 'Burn' and wait for your drive to get ready.

The USB drive will contain the DMG image you selected, and this can now be a portable boot drive to install that particular program on any Mac computer.

Method 3: How to Burn a DMG File to USB in Linux

The process of burning a DMG to USB in Linux is a little more complicated since it requires converting the file to an ISO before burning it to a drive. It also requires command line executions, but if you own a Linux machine you may already be familiar with command line work. Please note that in order for the USB drive to be bootable, the original DMG must have boot information. In here, we take Ubuntu Linux as an example.

Step 1: Download and install dmg2img by using the following command: sudo apt-get install dmg2img

Step 2: Convert the DMG to IMG with the following command: dmg2img sample.dmg

Step 3: Change the filename of the resulting .img file to .iso. Remember, this is still an IMG file, but it will have a .iso extension. Use the command below to do this: mv sample.img sample.iso

Step 4: Insert the USB drive, but make sure it is not mounted. If it is, you can unmount it with the following command: sudo umount /media/

Make sure you know the file path to the mounted USB drive. Although external drives are generally mounted in /media in Linux, it could be in a different location. To check, you can use this command: lsblk

This command reads the sysfs file system and shows you information about block devices. Your drive can usually be identified by the size, but make sure you use the correct disk name, not the partitions within the disk.

Step 5: You can now burn the DMG to the USB drive with the following command:

sudo dd bs=4M if=sample.iso of=/dev/sdX %% sync

If the original DMG file was bootable, then this .img version on your USB will also be bootable. The process looks a bit complicated, but it should work as long as you follow the steps described above.

The Bottom Line:

As we can see, burning DMG to USB on Mac is the easiest solution as you don't need to install any other tools or type command to complete the task, which could be annoying for some users. How about the Mac was broken and you want to create a bootable macOS disk to repair the computer? That depends what kind of computer you get at hand. Just follow the steps listed above according to the computer model.

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Are you looking to create macOS Catalina bootable USB installer on Windows PC?

Do you intend to install macOS Mojave/ Catalina on your Mac computer?

Or do want to do a clean installation?

If so, this topic is definitely for you.

Creating a bootable USB installer on a mac computer is easy. You can use the build-in-mac-Terminal with few sample codes.

However, if you don’t know how to use Terminal or you don’t have access to a functional mac computer, then you need to do it on a different operating system like Microsoft Windows or Linux.


As far as Linux is a rarely used by people comparing to Microsoft Windows, i will show you how to create a bootable macOS USB installer on a Windows PC.

Download macOS Catalina/Mojave dmg file.

To create macOS USB installer you need to have a dmg file of macOS Catalina/ Mojave.

For this purpose you can use App Store. if you do not have a functional mac you may download the dmg file from third party websites.

How You Can Create macOS Catalina Bootable USB Installer on Windows PC?

After you have downloaded dmg files , you can initiate making a bootable USB installer. On a Windows PC this can be done via a software called “TransMac”

TransMac is available in both 10 days trail version and premium version. If you can effort i suggest you to use the full version.

  • Read Also: Install MacOS Catalina on VirtualBox on Windows PC
  • Read Also: Install macOS Catalina on VMware on Windows PC

Steps to Create macOS Catalina Bootable USB Installer on Windows PC?

Step #1: Download TransMac.
To download this software open your broswer and download it from the official website.

Step #2: Install TransMac.
Installation procedure of TransMac is as sample as installing other programs on Windows PC. Simply run TransMac.exe then follow on screen instructions.

Step #3: Plug your USB drive to your Windows PC.
You will need at least 8GB USB drive to make a bootable USB installer of macOS Catalina/ Mojave.

Step #4: Open TransMac if it is not already.
Now you will need to run TransMac to procced further if it is not open already. If you are using a trial version of the software you will need to wait a couple of seconds, then click “Run”.

Step #5: After TransMac is launched on your PC desktop, right click on your USB drive, then select “Restore with Disk Image” as you see below.

Step #6: Now select macOS Catalina/Mojave DMG file where you have downloaded and click “OK”.

After you selected the dmg file you will be notified that your USB drive will be formated. Press “Yes” to continue.

Well done, your bootable USB installer is going to be ready in about 15-20 minutes.

How to Install macOS Catalina/ Mojave?

After you created bootable macOS USB installer follow the following steps to install macOS Catalina or Moajve on your mac machine.

  1. Plug your bootable USB drive and restart your machine.
  2. Hold ALT+R keys during starting your mac computer. (Before Apple logo appears)
  3. Select your bootable USB on the screen and follow on screen instructions.


You can create bootable USB drive both on mac computer and Windows PC. If you have a functional mac try Terminal and Unibeast.

To create bootable USB installer on Windows PC you can use TransMac for this purpose which comes both in trail and premium version.

I hope you find this article useful. If you find any question leave it in the comment box below.

Macos Dmg To Bootable Usb Drive