After installing ubuntu to a 32 GB. flash drive from a live usb, i attempted to boot the flash drive on my mac using target disk mode, but the mac cannot find it. After this, i booted my mac from the live usb, and i looked at the partitions on the flash drive, and everything was the way i had set it up. i also looked at the flash drive using mac disk utility, and everything looked fine. I was wondering why my mac cannot see the flash drive in target disk mode?
Mac = macbook air 11" (2013 model)
OS X = 10.9 Mavericks
Ubuntu OS = 14.04.1 LTS
External Hard Drive = Sandisk Cruzer 32 GB