Not recommend in MAC, there tones of stable tools instand of this command
#To view a list of all drives currently attached to your system run this command:
sudo fdisk -l
#To write the Live Install image to your USB run the following command:
sudo dd bs=4M if=/path/to/antergos-x86_64.iso of=/dev/sdX && sync
# https://antergos.com/wiki/install/create-a-working-live-usb/