After going around and around trying to get usb boot media working with my Macbook Air, I finally came across a gem that did the trick. I had an EFI partitioned disk and regardless of using Unetbootin, Yumi, and Lili, I was only able to boot just to receive this error:
error: file ‘/isolinux/vmlinuz0’ not found.
error: you need to load the kernel first.
The fix was to clean up my usb disk and then use Rawrite32. I found these instructions on the fedora project wiki under Windows Quick Start.
First, I had to blow away every partition on my usb device. Note: Take care to list disk and select the correct disk before running clean.
DISKPART> list disk
DISKPART> select disk 1
Once completed, download and install Rawrite32. When you launch Rawrite32, select Open. You’ll have to hit the drop down to show all files so you can select the ISO. Under target, you should see your USB device to write to. Hit Write to disk… and you should be ready to boot once it does it’s thing.