live usb with persistence with a boot for both mac and windows

[alexander35]

Hello Ubuntu forums.

I've got a 64 Gb usb stick that i want a live ubuntu install on with persistence so i can store my files on it but... her comes the catch

i need the install to work both with pc(64bit) and mac(64bit) with intel processors
i can install it so i can boot it from my mac
and i can install it so i can install it from my pc
but i can't install it so it will boot successful up on both.

is this possible or am i aiming to high here?
if its possible can anyone point me towards how to do it?

on advance THANKS :-D

[pfeiffep]

I'm not certain that persistence will use the same area for 2 different isos - here's a suggestion (http://ubuntuforums.org/showthread.php?t=2170254)