Macos Catalina Bootable Usb Windows 10

Create Windows 10 installer USB stick on macOS Catalina. Fri, 24 Apr 2020. Today my Windows 10 bricked itself after I enabled Hyper-V, I had no choice but to reinstall it. I only had my Macbook to create the USB stick. First of all, find out which device is your USB stick. Here are the steps to create a macOS bootable USB media (Catalina) with GPT partition support on Windows 10 or 7/8.1 to rescue your Mac. Create Windows 10 Bootable USB on Mac Using UNetbottin. To create Windows 10 bootable USB on macOS Mojave and macOS Catalina using Boot Camp Assistant isn’t supported anymore. But the easiest way to create Windows 10 bootable USB is using third-party software like UNetbottin. Create a bootable USB drive. When the Windows 10 ISO download is done, double click the file to open it. A new window will appear. Now copy all files to your USB drive (e.g. Via drag & drop). The copy process may take a little while, depending on the speed of your thumb drive. When this is done you can eject the USB stick.

  1. Macos Catalina Bootable Usb Windows 10 Download
  2. Macos Catalina Bootable Usb Windows 10 Software

Using both Windows and macOS, and suddenly mac refuses to boot. The reason behind this can be from a number of things that could go wrong. This includes system failure, bad updates, power failure, hardware failure. Unless there is a hardware problem that only can be diagnosed at the apple center you can fix your Apple computer.

It is an excellent practice always to have a bootable macOS USB, which you can easily create using macOS operating system. But since we’re here, you probably can want to make bootable USB using Windows 11 and 10. Let’s be real, and there are more Windows computers compared to MAC. Fortunately, you can use a Windows computer to create a bootable USB flash drive.

In this article, we’ll help you with the instructions to create a bootable macOS USB installation media from a Windows computer. So that you can use that USB to install or reinstall (upgrade) Apple’s macOS. You can create a macOS Catalina/sierra bootable USB using this guide to fix your operating system.

What’s needed?

You will need a few things before you get started. The first essential thing in it is a USB drive would be awesome if you use a USB 3.0, but you can get the work done using a slow USB as well. So, in contrast, you need the following things.

  1. One high-quality USB flash drive with 16GB of storage.
  2. TransMac software.
  3. MacOS operating system image (DMG file).

How to Create a macos Catalina bootable usb

The guide is simple and straightforward if you follow these steps.

Download and install TransMac on your Windows PC. It’s paid software with a 15-day trial, so you can use it within the time to create a bootable macOS USB flash drive. If you like the software and to support the developer you can buy the full version.

Plug the USB drive into your Windows computer that you’ll be using to fix your MacOS. And we are going to tell you something straightforward – backup if things are stored in USB Drive.

Step 1. Open the TransMac, and select Run as administrator. If you’re using the trial version, wait 15 seconds, and click Run.

Step 2. Use your USB drive right-click on it and select format disk format this will format the USB drive so that it can be used to store the Mac OS operating system. One thing you need to take care of that the USB drive needs in GPT partition in order to work on a Mac computer otherwise it won’t boot.

Windows

When it prompts select a name for your USB it doesn’t matter but just do it and click ok. If the formatting is completed successfully, click OK to continue.

Step 3. Again from the left sidebar right-click on the USB drive and select restore with disk image.

Step 4. Now browse to the location where the Mac OS system image file is located and click ok to load it.

Step 5. Click Yes to create the macOS USB bootable media.

It will take a few minutes to complete the process because the Mac Operating System is larger than any other operating system like Windows and LINUX in size. Now plug the USB drive into Mac computer in order to install, install or upgrade the operating system to the latest version of Mac OS, which can be Sierra or later.

THE TOOL CAN

  • Apple File System (APFS) volume read support.
  • Open Mac APFS/HFS/HFS+ format disk drives, flash drives, CD/DVD/Blu-ray media, HD floppies, dmg, dmgpart, sparsebundle and sparseimage files.
  • Copy files to Mac HFS+ disks and dmg images.
    Format as HFS+ for Mac .
  • Save and restore images of disks and flash drives.
  • Create, compress, expand and split dmg files.
  • Built in burner functionality to burn ISO and dmg files directly to CD/DVD/Blu-Ray.
  • Read Mac multisession and hybrid CDs.
  • View partition layout.

How to create a GPT partition on a USB flash drive

Macos Catalina Bootable Usb Windows 10

If the USB flash drive is not working using TransMac, it could be still a partition problem. In this case, you want to redo the entire process again, but this time use the following steps to use the Diskpart command-line utility on Windows to create the appropriate GPT partition.

  1. Open Command Prompt as an administrator. Type cmd in run dialog or open it from the start menu.
  2. Type the diskpart command and press Enter. This will display that is connected to your computer.
  3. Enter the list disk command to view all drives connected to your computer and press Enter. This command will show all of the partitions inside of a disc.
  4. Type the select disk command followed the number assigned for the USB flash drive (e.g., select disk 4), and press Enter. This command will select the disc partition of your choice.
  5. Enter the clean command and press Enter. This erases and formats the disc.
  6. Type the convert GPT command and press Enter. This convert master boot record to new GPT.
  7. Enter the create partition primary command and press Enter to complete the process.

Quickly create a macOS bootable USB on Windows

Now make a bootable USB using the TransMac software (follow instructions that are given above). Now connect the USB and power on your Mac computer while holding the option key and then select the USB Flash media to run the installation.

Learn using USB on MAC (Apple support page)

Learn more about making bootable USBs.

Make a bootable USB of Windows, Linux, Chrome and Android OS
Windows 10 Media creation tool Download and Creating Bootable USB Media

Article Contents

In previous tutorial, we wrote a post about creating macOS Catalina bootable USB on Mac, which is a simple tool and there are a couple of free tools to complete the task. You can even use the built-in tool Disk Utility and dd command to do it without installing any third-party apps. However, the situation is much different on Windows 10 because macOS install file (end with .dmg) is not supported by Windows OS. Unlike ISO image, there are few tools on Windows that can handle .dmg files. That's the most challenging part!

So in this article, we will show you how to create macOS bootable USB on Windows 10 and targets macOS Catalina specifically, which is the latest version of Apple macOS and it is easy to download the install file. This will be a great help if there were something wrong with your Mac and a fresh install was demanded. Also if you were a Mac enthusiast and can not afford the price, then it is not a bad choice to build a hackintosh with Catalina.

Before heading to the details of each method, please make sure you have downloaded a copy of Catalina OS dmg file and a working USB drive with more than 12GB storage.

Method 1: Create macOS Catalina Bootable USB on Windows 10 via DMG Editor

There are more than one solutions to create macOS Catalina Bootable USB on Windows 10 and we will go with easy one first. DMG Editor, a popular app developed by UUByte, is a multi-functional and cross-platform image burning tool that works on Windows, Linux and macOS. It supports creating bootable USB from popular image files, including dmg, iso, zip, img. And it has full support for Linux distros and old versions of Windows OS. macOS support was not available in previous versions. But now, the latest version of DMG Editor adds better support for macOS dmg file. Let's get a try first.

Step 1.Go to UUByte official website and download Windows version of Etcher from there.

Step 2. Run the executable file and complete the installation process. After that, insert an USB drive in Windows 10.

Step 3. Open the installed UUByte DMG Editor by double-clicking on the icon shown on your home screen. Click on the 'Burn' option then. After that, add Catalina .dmg file to the software and click on 'Change' button to choose the inserted USB device.

Step 4. Finally, click on the 'Burn' button to start the dmg burning process. At this time, a progress bar is displayed on the screen and it gives you an estimated calculation for the time remaining.

Step 5. Wait about 10 minutes. It will show you a pop-up message after completing the task successfully.

The process is very quick and easy to execute. But you might have issues running Etcher app on old computers with low profile hardware. Etcher GUI is built primarily on a new Javascript framework called Electron , which consumes a lot of computing resources. So if you were going to use Etcher to create macOS Catalina bootable USB, make sure testing it on a high-profile Windows 10 PC or laptop.

Method 2: Convert .dmg to .iso and Create macOS Catalina Bootable USB

macOS Catalina install image is distributed in .dmg format and Windows 10 has no support. Hen it is almost impossible to read such files in conventional ways. So in this part, we will convert macOS Catalina dmg file into ISO and create a bootable installer by burning the ISO file to USB. This can be done with the help of third-party software.

To execute the method, you need two software. First, you need a special software to convert dmg to ISO. Second, an ISO to USB burning software to make bootable USB from ISO file. To demonstrate, we have used 7 PowerISO & UUByte ISO Editor to create macOS Catalina bootable USB from Windows 10.

Step 1: Download and install PowerISO on Windows 10.

Macos Catalina Bootable Usb Windows 10Macos catalina bootable usb windows 10 download

Step 2: Insert your USB drive. Right-click on this peripheral device and choose the option to format it. After a few seconds, you will get the notification of completing the format process.

Step 3: Now, open PowerISO and navigate to Tool menu. From the pop-up list, please click the 'Convert' option.

Step 4: In a pop-up window, click the folder icon to add macOS Catalina dmg file in Source file field. And set an output file name under Destination file section. Next. choose Standard ISO Images (.ISO) from Output image file format.

Step 5: When the ISO file is created successfully. Download and install UUByte ISO Editor. Then click Burn button to open ISO burning Window. Next, add ISO file to the program and select the USB name. Wait for 7 minutes, and a bootable USB is ready!

Step 6: After getting a task completion message on screen, eject the USB and then start installing macOS Catalina from the USB drive.

The solution is simple but may need to purchase a couple of tools for executing the steps. But if you will search smartly on the internet, chances are there that you can get the required tools without paying any cost. However, if you want to bypass using any of the third-party tools, you can create the Catalina OS bootable USB by accessing macOS in a virtual machine.

Method 3: Use TransMac to Create macOS Catalina Bootable USB in Windows 10

Macos Catalina Bootable Usb Windows 10 Download

TransMac is a single-purpose utility to open Mac disk image from a Windows PC. It's one of the quickest methods to create macOS bootable USB drive from dmg file. However, the support for Catalina is not good as Mojave and High Serrira. Plus, you have to pay for 59 USD to use the burn feature. That's why we mention this app at the end of this post.

Step 1: Download TransMac from the official site and run the .exe file to complete the installation process.

Step 2: Now plug in a USB device into the port. Now right-click on TransMac icon shown on the home screen and then choose to Run as administrator.

Step 3: After landing inside the tool's window, all disk drives will be displayed on the left side automatically. Click File -> Open Disk Image to load macOS Catalina dmf file into the program.

Step 4: Before proceeding further, you need to format your USB device to make it compatible with Mac HFS or APS partition. For doing the same, click on the 'Format Diks for Mac' option. Wait for 30 seconds to complete the process.

Step 5: Right-click on the selected USB disk. From the shown list, click on 'Restore with Disk Image'. If it shows any warning message, just click on the OK button to accept.

Step 6: After that, select the location of saved Mac OS Catalina DMG file and then click on the OK button. Now stay back and look after 20 minutes. You will get ready with a bootable Catalina USB.

TransMac is one of the easiest method to create a bootable macOS Installer USB on a Windows PC. You can use this application to burn any version of macOS operating system file to USB.

Macos Catalina Bootable Usb Windows 10 Software

Conclusion

To conclude, we would recommend going with either the first or the second method to create bootable macOS Catalina USB. Both are super easy to follow because you don't need to install multiple tools and go through a multi-layer process to meet your requirement.