I want to install Ubuntu on an external USB hard drive (in a blank partition already made in mac) and then use rEFIt to alternate between operating systems.
The problem is that, when running the instalation program (Install Ubuntu 12.10) I am asked the next: "Device for boot loader instalation". And I get the next options:
- /dev/sda ATA WDC WD3200AAJS-4 (320.1 GB) (Internal)
- /dev/sdc WD 5000AAV External (500.1 GB) (External)
What option should I select?