I'm running Mac OS X 10.6.8 and I'm trying to set up my computer to dual boot with Ubuntu Studio. In order to create a bootable USB flash drive with the installer, I followed the steps from this official howto.
At the time the command completed I got an error dialogue stating that the disk is not readable on my computer. I tried to see if it would boot from it anyway by restarting & holding down option. However, the usb stick didn't show up as a boot option. How should I proceed now?