I cannot boot Ubuntu from my macbook. I have tried the official Ubuntu walkthrough for creating a USB boot stick (located here: http://www.ubuntu.com/download/desktop/create-a-usb-stick-on-mac-osx ) and it will not work. I get to step 10 (turn off computer. Turn computer on and hold alt/option) and it goes to a menu where I should be able to select Ubuntu but the only option available is "Macintosh HD". I have also tried this with a boot CD and using rEFIt but to no avail.
My macbook is an early 2008 model. I am trying to avoid partitioning my HD because I just want to try Ubuntu. After all, partitioning is not even required in the official walkthrough (see above link). Perhaps I have changed my preferences at some point? Or disabled a utility? Also, I'm using an 8Gb USB thumb drive.
I have tried partitioning that and still nothing. I don't really know what question to ask here... Like I said, I want to avoid partitioning my mac HD. Also, it must be Ubuntu... not any other distribution. Any ideas?