first of all, check exactly what the name of the target device you want to copy the image, an good option is the Disk Utility.
after that, open the console, go to the folder where you save the ISO and use the DD command:
like that: #dd if=CentOS-7-x86_64-Minimal-1611.iso of=/dev/disk2 if= iso file of= usb device name REMEMBER: DD WILL HAVE PLEASURE IN WRITE THE "ISO" IN ANYONE DEVICE TARGET, INCLUDING YOUR SYSTEM DISK, SO... TAKE CARE TO USE DD !!! -when dd finish the copy, the mac_os will try mount the USB and you will saw this windows, this is not an error, just click ignore and takeout your USB
#linux #centos #ubuntu #esxi #installing