I have downloaded El Capitan and have formatted my 8gb usb drive and have partitioned and have typed the command in terminal and every single time I get the error message "Untitled is not a valid volume mount point". My drive is titled Untitled so it isn't any problem with that syntax to my knowledge. I am about to give up. I have even tried copying and pasting others command lines into terminal hoping that perhaps I may have in fact messed with the syntax and didn't catch it. Even trying this though I still get the same old response. What can I do and what am I doing wrong? Thanks guys. I'm at your mercy.