Bootable Usb For Macos Catalina

2/12/2022by admin

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.

Apple has just released the latest update to macOS. The update, named macOS Catalina, brings a bucket-full of new features including the ability of using iPad as an external screen for Mac. It also officially kills the 20-year-old iTunes (on Mac) and brings separate apps to manage music and podcasts while also adding a new TV app.

Other notable changes include the abandonment of 32-bit apps in favour of 64-bit apps, refreshed Reminders, Photos, Mail, Safari, and Notes apps, and the introduction of Apple Arcade among others.

  1. You can use an external drive or secondary volume as a startup disk from which to install the Mac operating system.
  2. I have successfully created a macOS Mojave bootable USB from macOS. Then I thought I should back up the partition of the macOS installer and share it with everyone who wants to use it from Windows. I have created two partition image files, the first is Clover Bootloader and the second one is macOS installer.

Whether you should upgrade your Macs to the new macOS Catalina is entirely up to your current workflow. The change that could affect it the most is the support for 32-bit apps being officially dropped. If you rely on old apps that needs an update for the new platform, you might want to hold your upgrade until these apps are updated or you find alternatives.

With macOS Catalina, Apple has changed the way you used to download the installer. Previously, you would download the new OS installer from AppStore itself and then use that installer to make a bootable installer for later use. In Catalina, when you click the Get button in AppStore, you are taken to the Software Update screen to download the new update.

This change makes is a bit tricky to create a bootable install media like a USB stick or memory card. Albeit not as straightforward as before, but it is definitely possible to make a bootable installer for macOS Catalina. This tutorial shows how to do that.

Update – 12th November, 2020: The latest update to macOS is out now. Learn how to make a bootable macOS Big Sur installer.

Make a Bootable macOS USB Stick or Memory Card

Bootable Usb For Macos Catalina Mac

Before you begin:

  • Make sure you have a USB stick aka pen drive aka flash drive or memory card aka SD card with at least 16GB of storage.
  • Take complete backup of data on your Mac.
  • Make sure you have a working, strong, and stable Wi-Fi connection to download macOS Catalina.

Step 1

Due to the way you get your copy of macOS Catalina has changed a bit, we will rely on a third-party app which will help us get the installer. The app we will use for this is called macOS Catalina Patcher which is primarily used to make a patched installer for old Macs that don’t support new versions of macOS.

Download macOS Catalina Patcher, place it under Applications, launch it, and click Continue. Click Download a Copy.

Now, before you move to the next screen, click Options in the menu bar and disable ‘Auto-apply Post Install Patches.’ After that, click Start Download and wait for the download — that is around 8GB — to finish.

Update: I just read other tutorials mentioning that you don’t need macOS Catalina Patcher. You can download macOS Catalina installer from the Software Update screen and it’s placed under Applications. If you wish to go ahead with that method, you can change the path in the Step 3 from Downloads to Applications.

Step 2

Once the download is finished, you can see ‘macOS Catalina Installer” under Downloads folder. Now it’s time to erase your USB stick or memory card.

Insert the medium you wish to use for creating a bootable installer in your Mac and open Disk Utility. Select the medium from the list on left and click Erase. Select Mac OS Extended (Journaled) under Format. Type Untitled in Name field (you can choose any name here).

Click Erase and wait for the process to finish. Remember that you are completely erasing the data on this media.

Step 3

Now you are ready to move to the final step which is to create the bootable macOS Catalina media.

Open Terminal and type the following command. Make sure you don’t leave any spaces in-between.


sudo /Downloads/Install macOS --volume /Volumes/Untitled

Note: Replace Untitled (in bold above) with whichever name you gave in step 2.

If copying and pasting or typing this command doesn’t work, you can do the following.


Type sudo in Terminal and keep the window open. Now open Downloads folder and drag the macOS Catalina Installer file on the Terminal window. It will automatically generate the path where your Catalina installer is located.

Now, append --volume /Volumes/Untitled at the end of the automatically generated string and press Return key on keyboard. Note that there are two dashes (--) before volume and a space after volume.

Enter your password, press Y and press enter to start the process and let it finish — which will take about 15 minutes.

How to Install macOS Catalina from a Bootable Volume?

Once Terminal finishes the process, you can restart your Mac and when it is booting up, press and hold Option key until you see a black screen with an option to select the startup disk.

Select Install macOS Catalina and click continue. Let the installer load and once it’s finished, you should enter macOS Recovery screen which will ask you to select a user account which you know the password of. Choose your administrator account and enter its password.

Now click Disk Utility and continue. Select the volume where your current macOS is installed. The volume is usually named macOS. Click Erase. Leave the options as default and click Erase again.

After the process finishes, close Disk Utility and you will return to the recovery screen. This time, select Install macOS and continue.

Let the install process finish, which consists of a couple of automatic reboots. Once finished, you should see the initial macOS setup screen. After you are done with this on-boarding step, you will see the desktop and are all set to start using macOS Catalina on your Mac.


Boot Usb Mac Os Catalina

Making a Bootable macOS Installer Media: Summing Up

Bootable macOS installer is useful if you want to completely erase your Mac and reinstall the operating system, or if you have more than one Macs and you don’t want to spend time (and bandwidth) downloading the macOS update.

Bootable usb for macos catalina os

Making a bootable macOS Catalina installer isn’t too complicated. You can make a bootable flash drive aka pen drive aka USB stick or memory card and use it to install the latest macOS version on your Mac.

That’s it, folks. This was a quick tutorial on how to create a bootable macOS Catalina installer on a flash drive or memory card. I hope you found it useful.

Support Me: If this article/tutorial helped you today, please consider supporting me and help me run

How to create a Windows 10 bootable USB on macOS Catalina? If that question has been bothering you for a while, we've got a couple of great solutions. Just because ISO is not a native format for macOS computers, that doesn't mean there are no tools to get the job done on a Mac. In fact, we've showcased the best two methods to create Windows 10 bootable USB media on macOS Catalina, the latest version of the Mac operating system for iMacs, MacBook Pro and other desktop-based devices.

Advantages of Upgrading to macOS Catalina

The latest iteration of Apple's desktop software offers several advantages over previous versions like Mojave and High Sierra. Although macOS Catalina will forever be known as the iTunes killer, it did bring a whole new set of features apart from decimating the famous media manager and breaking it up into three parts. Here are some of the key advantages it brings to Mac users worldwide:

● The sidecar feature allows you to use an iPad in tandem with your Mac computer as a secondary screen. This creates a seamless transition between the touch and pen-enabled iPad and the keyboard and mouse-restricted Mac interface, allowing you a great deal of flexibility in the process.

● The Screen Time app makes it easy to manage how long your kids or even you use the computer, allowing you to manage computer and mobile addiction in a safe and convenient way.

● The Photos app now does a better job of curating the best images in your collection, and the integration of artificial intelligence elements makes it more intuitive when you're searching for specific memory moments.

Bootable pendrive macos catalina

macOS Catalina is also great for making Windows 10 bootable USB, as long as you have the right tools and know the right methods to get the task done. Here are the three best methods to create Windows 10 bootable USB on mac Catalina with detailed instructions.

Create Windows 10 Bootable USB on Mac Catalina #1:UUByte ISO Editor

Creating Windows 10 bootable USB on Mac Catalina is much more challenging than doing it with a Windows PC, which has many tools to complete the task. Actually, you can use Terminal app on Mac for this task but it involves complex commands and this is very hard for beginners. So our first recommendation is a beautiful GUI-based app called UUByte ISO Editor.

UUByte ISO Editor is a great tool to manage your ISO files on Mac, including the one to create Windows bootable USB for installation. In addition, you can edit ISOs, extract content, add or remove files, and even copy CDs to ISO. The interface is user-friendly, and you won't have to do all the complicated work of verifying your ISO after burning, messing around with complicated settings, and so on.

Highlights of ISO Editor

  • Simplified and elegant user interface.
  • Support large Windows 10 ISO file (> 5GB).
  • Easily create Windows bootable USB and DVD.
  • Edit ISO files and repack into a new one.
  • Extract content from ISO image to local hard drive.
  • Support latest macOS Catalina and Windows 10.

Step 1: Download and Install UUByte ISO Editor App on Mac Catalina

Download and Install UUByte ISO Editor for Mac. Make sure you download an authentic copy of the DMG file from the official website.

Step 2: Download Windows 10 ISO and Insert USB

Download the ISO file for Windows 10 from the official Microsoft website. Since you're on a Mac, you'll get to bypass the Media Creation Tool and download the ISO file directly to your computer. Insert your USB pen drive with at least 6 to 8GB of free space. If you have anything on it, take a backup because it will be formatted when creating the Windows 10 installer.

Step 3: Start Creating Windows 10 Bootable USB on Mac Catalina

In the UUByte interface, you'll see several modules, including Burn; click on it. On the next page, you'll see your USB drive automatically detected. Import the downloaded Windows 10 ISO to the app and hit the Burn button and wait for your Windows 10 bootable USB to be ready in less than 10 minutes.

[Edit]: Old version of UUByte ISO Editor is unable to handle latest Windows 10 ISO image and we fixed the issue. Please download the latest version of UUByte ISO Editor from our website and burn large Windows 10 ISO to USB. A new pop-up message will show up, telling you it is currently in process to split install.wim file contained in ISO image. Please wait 3- 10 minutes for that.

This is the easy way to create a Windows 10 bootable USB on Mac Catalina, but there's also another way if you're familiar with setting up a virtual machine on your Mac.

Create Windows 10 Bootable USB on Mac Catalina #2: Boot Camp Assistant

Boot Camp Assistant is pre-built app of macOS that essentially run Windows OS on a Mac. Fortunately, you can piggyback on it to get the Windows 10 ISO file and write it to a USB drive. Here are the steps you need to replicate to use Boot Camp Assistant app for creating Windows 10 bootable USB on Mac Catalina.

Step 1: Launch Boot Camp Assistant and then insert your USB drive into an available and working port. The will need to be of 6GB capacity for the 32-bit version and 8GB for the 64-bit version of ISO, depending on which one you downloaded.

Step 2: In Boot Camp, choose the option for creating an install disk. Be sure not to choose the Install option because you're not doing an installation right now, just creating the bootable media so you can install Windows 10 on a different machine.

Step 3: When you hit Continue, the software will automatically pick up the ISO file and display the location in the ISO Image section. Make sure it's the right one and also make sure that your USB is correctly displayed in the section below it.

Step 4: When you see the name of your USB drive change to WININSTALL in Finder, that means it's ready to be used as an installer. Eject it in Finder and remove it from your Mac.

This method is easy and doesn't require additional tools, but Boot Camp Assistant has known issues when working with Windows 10 ISO for that reason, we recommend UUByte ISO Editor for Mac since you won't have any of those problems. If you're technically adept, you can also try creating a virtual machine, as explained in the following section.


  • No enough disk error.
  • Not recognizing USB drive .
  • No USB option available .

Create Windows 10 Bootable USB on Mac Catalina #3: Virtual Machine

Virtual machine is now widely known to most of us, especially in tech field. The virtual machine software are able to run a guest operating system along side with the host operating system. It means you can run a Windows 10 instance on a Mac. This can be done with the help of VirtualBox software, a free and open source tool.

The process is a little complicated if you don't know what you're up against, so we're not covering it in this article. You can head over to the WikiBooks web page for that. Once you've done that, you will need to set up Windows 10 in VirtualBox to create the installer. Once you've done that using this resource, you can now use the media creation tool to get the ISO and create the Windows 10 USB installer. The process is explained below:

Step 1: Download VirtualBox Mac DMG file and create a new virtual machine in VirtualBox.

Step 2: In the Windows environment that you've set up on your Mac, open a browser window and head over to the Windows 10 ISO download page.

Step 3: Follow the process to download the ISO file. Make sure you choose the option to download the media creation tool and then to download the ISO file so you can use the tool to create the installer without any additional software.

Step 4: Insert a blank USB into Mac and use Media Creation Tool to download and burn the ISO file to the USB drive.


  • Complex setup for non-technicians.
  • Operations in Virtual machine is limited.
  • USB may not be recognized in Virtual machine.


Obviously, this is a roundabout method to create Windows 10 bootable USB on Mac Catalina that you should only consider if you're comfortable with setting up the virtual machine in the first place. The better option is to use UUByte ISO Editor for Mac because you won't have to mess about with complex tasks. All you need is a USB drive, an authentic Windows 10 ISO, and the software itself. In just a few minutes after that, you'll have a reliable USB installer for Windows 10 that you can use any number of times to set up a PC running the latest version of Microsoft's operating system.

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