You have to figure out the disk identifier of the USB drive you need to format.

After connecting a USB drive to your Mac, open a Terminal window and type diskutil list to display all the disks attached to your machine.

Of course, if you prefer not to use third-party software, you can still use the excellent Terminal app, which is a little bit more involved, but no additional software needs to be installed. Method 2: Create Windows 10 Bootable USB on Mac Using Terminal

This process takes several minutes or longer, depending on the size of your selected ISO image.

Click OK to start installing to the USB drive.

Choose Type as USB Drive and select the device name of your USB drive (you probably would’ve noted it down earlier, so refer to that).

After locating your Windows 10 ISO file, click on Open.

Select the “ Diskimage” radio button, click “ …” to select a bootable ISO image.

Next, download and launch the UNetbottin utility.

Note down the device name since we will need that later. Select your USB drive from the left panel and click on Info button.

Plug a USB drive into your Mac and open Disk Utility.

If you’ve downloaded Windows 10 ISO image, here is how you can create a bootable Windows installer USB on Mac using UNetbootin. UNetbootin is a free, open source utility that allows you to create bootable USB drives on Windows, Linux, and Mac OS X.

Method 1: Create Windows 10 Bootable USB on Mac Using UNetbottin In this tutorial we’ll show you how to create Windows 10 bootable USB from ISO on Mac, by using the Terminal or third-party software like UNetbottin. How can I make a bootable Windows installation USB on Mac OS X? After upgrading to macOS Mojave, you may find that Boot Camp Assistant is no longer supported and thus creating a bootable USB turns out to be a little bit challenging.

Burn iso image to usb on mac