Bootable USB from ISO on Mac

The nice way to get a progress bar while making a bootable USB drive on a mac is:

pv -ptre /path/to/some.iso | dd of=/dev/diskX bs=1m

pv does the progress bar magic, you may need to install pv first:

sudo port install pv

the parameters to dd: of, the out file, in this case the USB device and bs will make sure things move a bit faster.