Hi, I have search the forums and so far only 2 persons mentioned that only Firewire harddisk can be cloned to make a bootable OS X. And there is only 1 person who said USB harddisk can do the job too. I have bought a Maxtor 200GB harddisk and a USB2.0 enclosure. No matter what softwares I use to clone my ibook, i cannot get the external harddisk to boot. So now I am wondering if by changing the casing to a firewire and USB2.0 combo can help solve the problem.