Burn an ISO image to a USB drive on a Mac

1. List the disks on your Mac

   $ diskutil list
2. Unmount the USB drive

   $ diskutil unmountDisk /dev/disk6

   Change the /dev/disk6 to the name of your USB drive

3. Burn the ISO image to the USB drive

   sudo dd if=~/downloads/ubuntu-20.04.3-desktop-amd64.iso of=/dev/disk6 bs=1m

   Change ~/downloads/ubuntu-20.04.3-desktop-amd64.iso and /dev/disk6 to your path and name of the USB drive

4. Eject the USB drive

   $ diskutil eject /dev/disk6

   Change /dev/disk6 to the name of your USB drive