I'm trying to create a USB stick that is bootable on both PC and Intel Mac systems, which will contain a full installation of Ubuntu (i.e. not just a LiveCD).
I've succeeded in creating a USB that will boot on PCs and a Macbook Pro from ~2009. However, trying the same USB on a newer Macbook Pro, from late 2011, does not work.
I have gone with a method adapted from the one described here, which creates a Mac partition on the USB and copies some rEFIt files into it.
On booting the new Macbook Pro, holding the option key allows the choice of boot device to be made. Selecting rEFIt then allows Linux to be chosen, which works the same way as on the older Macbook Pro. However, on the late 2011 model, following the selection of Linux, all I get is a screen saying that no bootable devices were found.
Does anyone know what might be causing this, and, if so, how to fix it? The version of Ubuntu I am trying to run is 10.04 32-bit.