Xbian USB install on Mac OSX

[northernmonkeyz]

Hi,
I am a few months in using the Raspberry Pi and I so far have tried OpenElec and Raspbmc.
The above systems have been good as far as playback is concerned however I found that despite overclocking them, the menu loading (working) waits were quite long – sometimes taking 20 seconds to change to the next page.
This seems like a long time when I am trying to get to something 5 clicks in.
I am hoping that Xbian is faster in the menus?
I am not worried out boot times being slower just the menus and smooth playback.
My set up is –
RPI Model B
8gb SD card (class 10)
16gb USB 3.0 Sandisk Extreme stick
Raspberry Pi Power Supply, 5V, 1A
Can anyone tell me how I would go about installing using the USB stick on a Mac?
I am not too clever with coding etc so was hoping there was an install set up like in Raspbmc.
Thanks for reading!
Al