Please leave your feedback for our Linux/Mac installer.
I am trying to use the Mac installer on 10.8.3 and it is creating the disk image on my hard drive not on the selected disk....I have the image and Xbian script all in one folder in /User/Downloads/Xbian
So, more testing needs to be done. After christmas i will create a version that will be more verbose so people exactly know what the installer is attempting to do.
dd works fine for me! Alpha 3 is working well as well!