I'm trying to install Ubuntu 12.04.2-desktop-i386 on an Intel Mac Mini with OS X 10.4. I've used Unetbootin to create a bootable USB of Ubuntu, but when I select Linux (rather than OS X) the screen goes black and I get a terminal reading that says BOOT ERROR. Total noob, no idea what to do, haven't been able to Google specific-enough instructions to figure this out. Help would be super-appreciated.