Apple has changed the installer in OS X 10.9 Mavericks. Thankfully, Apple has also provided a utility which makes it extremely easy to create a bootable install disk.
For the remaining steps, you’ll need to launch Terminal from the Applications » Utilities folder.
The utility to create the installation media only has a few options but you can list them by executing the following command:
"/Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia" -h
Here’s the output for
Usage: createinstallmedia --volume <path to volume to convert> --applicationpath <path to Install OS X Mavericks.app> [--force] Arguments --volume, A path to a volume that can be unmounted and erased to create the install media. --applicationpath, A path to copy of the OS installer application to create the bootable media from. --nointeraction, Erase the disk pointed to by volume without prompting for confirmation. Example: createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install OS X Mavericks.app This tool must be run as root.
To create the install media, execute this command:
sudo "/Applications/Install OS X Mavericks.app/Contents/Resources/createinstallmedia" --volume /Volumes/Untitled --applicationpath "/Applications/Install OS X Mavericks.app"
Untitled is the name of the destination volume — your USB flash drive.
You’ll have to enter your account password before proceeding. The utility will then prompt you to confirm that the disk can be overwritten. That’s it.