USB as the name; Mac OS Extended Journal as the format; GUID Partition Map as the scheme; Note: Make sure you choose the right device or you’ll be erasing a device that may have data that you want to save. Everything on your drive will be deleted, so make a backup of any important documents or files that may exist on the USB. This tutorial will help you create a bootable USB flash drive for your Mac on a Windows computer using Transmac.Please visit https://www.kevinmuldoon.com/cre.

A bootable installer is a special type of media that can be used to reinstall operating system or fix system issues that never be solved in usual way. When there is something with your Mac, or you urgently need to upgrade your Mac to the latest version of macOS, a bootable installer could be a great help.

This tutorial tells you how to easily create a bootable installer for macOS on both Windows and Mac.

Before getting started, you should know there is only two types of installation media for macOS. One is the official macOS installation app, which is only available from Mac App Store. The other is macOS dmg file, which is made by third-party developers or system administrators.

Part 1. Create a Bootable Installer for macOS on Mac

macOS is the native operating system for all Mac computers. And Apple provides an official tool to create bootable USB installer from macOS installation app with the help of Terminal command, which is totally free. In addition, it is also possible to make a bootable macOS installer from DMG file. We will show examples for both tactics.

Create a Bootable Installer for macOS with Official App

This is the most reliable way to make bootable macOS installer on Mac as it is backed by Apple. It is completely free and no need to download additional software for this purpose.

First, download macOS from Mac App Store. Just launch App Store app on your Mac and search for the macOS name. However, only the most recent versions are available for download, including Big Sur, Catalina, Mojave and High Sierra. After that, click the Get button (Big Sur as example) to download the installation app on your Mac.

Make A Bootable Mac Usb On Windows

The downloading process will take more than 15 minutes as the file size is pretty big (Over 8GB). When it is completed, you will see a Install macOS [version name] app in Application folder.

Now, insert an USB drive into Mac. If everything goes fine, you will see the drive name in left sidebar of Finder app. Then, open Terminal app and type the following command to find the actual volume name of USB drive, which will be used in next step: ls /Volumes/

In above example, the volume name of my USB drive is Big Sur.

How To Make A Bootable Mac Usb Drive

Finally, copy one of the following commands to Terminal and change the volume name. Click Enter to start creating a bootable installer for macOS.

Big Sur: sudo /Applications/Install macOS Big Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/Big Sur

Catalina: sudo /Applications/Install macOS Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Big Sur

Mojave: sudo /Applications/Install macOS Mojave.app/Contents/Resources/createinstallmedia --volume /Volumes/Big Sur

How to make a bootable mac usb drive

High Sierra: sudo /Applications/Install macOS High Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/Big Sur

You have to wait at least 10 minutes for the above task to be finished. After that, you can use the bootable USB installer for macOS reinstallation, downgrade or upgrade.

Create a Bootable Installer for macOS without Terminal

If you are scared of using text commands in Terminal, please don't worry. There are still two free GUI app available for this task. One is MDS and the other is Disk Marker X. We will go with MDS first.

MDS is popular Mac deploying tool developed by Twocanoes. It can help you set up Mac, download macOS, create bootable macOS installer, install macOS and configure macOS in just a few seconds. Most importantly, it is built upon a modern graphics user interface, making it super easy to use.

First, download MDS from this link and install the app on your Mac. Once loaded, navigate the left sidebar and find go to Download macOS, where you can download the desired macOS. Currently available versions are Big Sur, Catalina, Mojave and High Serria.

After download, please move to Create macOS Installer section. Please select the macOS installer you just downloaded and a target USB drive. Finally, click the Create button to begin making a bootable USB installer for macOS.

Disk Marker X is another free app with the sole purpose for creating a bootable macOS disk. It has been available since Mac OS X Lion (10.7) so it is very popular and reputable solution. The only drawback is that it does not support macOS Big Sur. You can create bootable installer from the following OS candidates.:

  • macOS Catalina (10.15)
  • macOSMojave (10.14)
  • macOSHigh Sierra (10.13)
  • macOSSierra (10.12)
  • OS X EI Capitan (10.11)
  • OS X Yosemite (10.10)
  • OS X Mavericks (10.9)
  • OS X Mountain Lion (10.8)
  • OS X Lion (10.7)

The steps are also quite simple. First, download a macOS installation app and open Disk Maker X. Next, select the location of macOS install app and pick up the drive name. Confirm the operation as it will erase the whole disk. Finally, click Erase then create the disk button to start the process.

Create a Bootable Installer for macOS from DMG File

In case, you are unable to download the official macOS installation app, an alternative choice is to make a bootable installer from macOS dmg file, where you can find them on this website or other places on Internet. The software to be used is called UUByte DMG Editor, which works on both Windows and macOS platforms. The details steps will be shown in next section.

Part 2. Create a Bootable Installer for macOS on Windows 10/8/7

Windows, even Windows 10 does not add support for dealing with macOS installation app, which is working on macOS only. If you are on a Windows computer and search for a way to create bootable installer for macOS, the only option is by using macOS DMG file.

So in the coming section, we will demonstrate on how to create a bootable installer for macOS from dmg file on a Windows 10 PC. The steps are the same on Windows 8 and Windows 7. The software we are going to use is UUByte DMG Editor, a cross-platform app that runs well on Windows and Mac.

Step 1: Download a macOS DMG file. These are download links of macOS DMG file, such as Big Sur, Catalina, Mojave, High Sierra, and EI Capitan. For old Mac OS X versions, please download it from Internet.

Step 2: Install DMG Editor on a Windows computer and open it after installation. Now, plug a USB disk into Windows and click Burn button from the main screen. Make sure eject other USB storage devices at the same time.

Step 3: Click the Browse button to locate the macOS dmg file you have downloaded and select the USB drive name in below column.

Step 4: Finally, click the Start button to create a bootable installer for macOS on Windows 10.

Step 5: For a fast USB 3.0 drive, you need to only wait a couple of minutes. For slow USB 2.0 drive, you should wait more than 20 minutes. Please be noted! You will see a notice on screen when the burning process is completed.

There are few tools that are capable of creating macOS bootable USB on a Windows machine. For this task, UUByte DMG Editor is good to go!

Part 3: Install macOS on Mac from Bootable Installer

Eject the USB from Windows 10 computer and plug it into your Mac. Reboot your Mac and keep pressing the Option key at startup to bring up the boot manager. Pick up the drive name and boot up from external USB. After that, follow the screen prompt to start installing macOS from USB on target Mac.

Closing Words

Make A Bootable Mac Usb On Linux

The above is a complete tutorial for creating a bootable installer for macOS on Windows and Mac. It covers all the details and being verified on four different computers (MacBook Pro, iMac, Windows 10 PC and Windows 7 Laptop). Please go ahead and pick up the best method for you.

Make A Bootable Mac Usb

Create the Final USB. After the first USB is done, you can reboot your computer into Tails. As it’s rebooting, make sure that your computer is set to boot to USB. Select Tails from the boot menu. Then, when Tails boots, select your language and region. After a few seconds, you’ll see the Tails desktop. Insert your second USB now. For those who failed to create bootable USB with TransMac, take a look at UUByte DMG Editor. I managed to create two bootable USB from macOS Mojave and Catalina DMG file and successfully installed them on respect Mac. First, make sure the dmg file you downloaded is valid. If you have a Mac system but want to run Windows on that system, you will need to create Windows 10 bootable USB on Mac for PC. Even if the Mac system uses Mac OS, you can still run Windows on it this way.

Make

Create A Bootable Usb From Dmg Mac

With a bootable Ubuntu USB stick, you can:

  • Install or upgrade Ubuntu, even on a Mac
  • Test out the Ubuntu desktop experience without touching your PC configuration
  • Boot into Ubuntu on a borrowed machine or from an internet cafe
  • Use tools installed by default on the USB stick to repair or fix a broken configuration

Creating a bootable USB stick is very simple, especially if you’re going to use the USB stick with a generic Windows or Linux PC. We’re going to cover the process in the next few steps.

Make A Mac Bootable Usb Drive

Create A Bootable Usb From Mac Hard Drive

Make A Bootable Usb Mac Disk Utility

Make A Bootable Mac UsbMake a mac bootable usb on windows 10

Apple hardware considerations

Create A Bootable Usb Mac Catalina

There are a few additional considerations when booting the USB stick on Apple hardware. This is because Apple’s ‘Startup Manager’, summoned by holding the Option/alt (⌥) key when booting, won’t detect the USB stick without a specific partition table and layout. We’ll cover this in a later step.