Q: Here's my tools: A new (2008) 24" iMac 3.06ghz, 2gb of ram, 250gb of hard drive space with windows vista ultimate installed. A 500gb western digital My Book edition external hard drive. A 250GB maxtor OneTouch II external hard drive. I would like a guide to show me how to install Ubuntu on an external hard drive (either one hard drive is fine) on a mac. I have done a little research and know that I have to have a live cd and that I have to set up my computer to have the bios boot from cd but I am not sure how to do that on a mac. Any guide would be fine. All of the answers so far are great advice and exactly what I am looking for however, like one answers dictates, how do you go about changing the bios on a mac?
A: You can go to https://help.ubuntu.com/ or http://www.ubuntu.com/support for help. Also try http://ubuntuforums.org/ for user forums to help you figure it out. Do you have your Live CD yet? If so, put it in your drive, making sure your external is connected, and reboot your computer. It may boot from the disk, if so, install it on the external. You can try it without installing it, and it will run from the cd, and there will be a desktop environment with an install icon on the desktop. double click it, and choose the drive you wish to install it on, and follow the prompts. hope I helped, I just began using it about 2 weeks ago. It helps if you have Linux experience, I ran Debian for a couple of years on my server, but Ubuntu is great. Hope you enjoy!