I am making my first transition from Windows to Mac with the 2011 MBA. I have some questions on how to backup the stock OS install on my MBA. Can someone give me some advice? For PC (Windows), such as a Dell laptop, before I even turn on the machine to set up the stock OS that is already installed for the every first time, I would make a habit of booting the machine to an external CD running Acronis and make an image backup of the entire hard drive. This way, when I restore the image, the laptop will revert to the state as if I just took it home from the store and turn it on for the first time. For Mac, I understand that OSX, on first boot, will walk me through a setup procedure. I like to know how I can force the MBA to boot to an external CD running some sort of image software so that I can make a 1:1 disk image before any personalized setup is done by the OS. How do I do this? What program should I use (commercial or otherwise). Must I do this using a prepared CD with the USB-connected superdrive? Can I use a prepared USB to do the same?