Does a livecd exist ?
A live CD is a CD which allows you to boot up an OS off of the CD itself without having to install or access the computer’s hard drive in any way. Most live CDs contain basic internet and word processing tools, and are especially useful at times when your hard drive does not work. At this time, the closest thing to a live CD for Mac OS X is the BootCD program available from http://www.charlessoft.com/. Judging by how OSs tend to work, and how large they are, it is not possible to create a live CD for Mac OS X that is completely compatible with a regular OS X installation, and the CD produced by BootCD is more useful for troubleshooting tasks than as an OS substitute. There is a similar unofficial Live CD builder for Windows XP, titled BartPE. It is mostly used for system recovery purposes and is again not designed to be a ‘production’ OS.