If you’re performing testing on a Mac and looking for a simple application to ghost/image the hard drive, take a look at Carbon Copy Cloner. I know it seems like you should be able to just copy all the files to an external hard drive and just select it from the Startup Disk preference pane, but it doesn’t work in MacOS X. And, if you’re doing a lot of configuration testing, installation/uninstallation, etc., it would be really handy to have an identical copy of the hard drive, right? Carbon Copy Cloner (CCC) to the rescue.
Just install CCC (or SuperDuper!) and you can clone a low-level copy of your internal hard drive to another partition or drive. It’s very handy, and if you really want a good backup, you can have it scheduled to update the cloned image so you’ll always have the latest version of all your hard drive files. When my hard drive suffered an unfortunate failure a few years ago, I had no worries – I had an identical copy of my hard drive all setup which allowed me to recover all my work on another Mac. It’s fast, accurate, and donation-ware so you can try it out before you buy.