I installed Ubuntu using a USB stick (followed Ubuntu installation instructions for USB using UUI) on an existing windows 7 pc. I used an old unused partition (which had an old fedora distro) It installed successfully.
I'm trying to install Ubuntu 12.10 on my macbook. I downloaded and put it on a usb stick as per these instructions. Everything seems to work fine until I restart my comp and try to boot from the USB: The only option it gives me is macintosh hd.