I have followed the guide from http://www.ubuntu.com/download/help/create-a-usb-stick-on-mac-osx and then at step 8, which is "Execute sudo dd if=/path/to/downloaded.img of=/dev/rdiskN bs=1m
", I get a problem, it says: "dd: /Downloads/ubuntu.dmg: No such file or directory
". I have checked, it should be there.
Help needed, Thanks :)