Is it possible to boot backtrack from usb on a macbook pro? I would like to boot BackTrack on my MacBook Pro from a USB drive but it seems impossible. I'm holding the Alt key on boot, but the mac only displays "Macintosh HD", i.e. it doesn't recognize my USB. Anybody knows if booting a Linux distro from a usb possible? 

Thanks.
Apparently your USB stick, to be bootable, must be setup for EFI/GPT.