Depending on how your mac is configured, you could always boot from an Ubuntu LiveCD and run the process that way. I haven't tried it on my MacBook Pro yet, but I also bet you could install Linux in a virtual machine within Virtualbox and get it to work that way too.
http://www.virtualbox.org/Both Ubuntu and Virtualbox are free as in beer so no real monetary cost.
I have run the alpha-6 installer from my Ubuntu box at work but haven't tried the new 1.0 installer from Windows yet. I may try natively on Windows and virtually on my Mac. Only difference is I am running VM Fusion instead of Virtual Box, but I guess I could install that as well. There goes my weekend...