I work in a small business where about 95% of our computers are Macs and I am the main person that maintains them. One approach that has saved me many hours of time is that I've been keeping OS X install images on my hard drive, ready to be transformed into a bootable drive, at all times. I would like to do the same for Mavericks but I have been unable to find directions that don't involve making a one-off bootable disk. What I want to achieve is the setup I have now: * I have OS 10.8's InstallESD.dmg file sitting in my application installer folder * Whenever I want to image a mac, I plug in an 8GB+ USB drive and use Disk Utility to format it appropriately and restore it with the InstallESD.dmg file, creating a bootable USB install drive Right now I have the 10.9 installer sitting on my computer, so I'm ready to do whatever I have to do to achieve my former setup for Mavericks. I want to create a single .dmg install file that I can use to restore a disk and create a bootable USB drive at will. How can I achieve this?