Bootable OS X Mavericks USB install disk

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.

First, download OS X 10.9 Mavericks from the Mac App Store.

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" -h

Here’s the output for createinstallmedia -h:

Usage: createinstallmedia --volume <path to volume to convert> --applicationpath <path to Install OS X> [--force]

--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

This tool must be run as root.

To create the install media, execute this command:

sudo "/Applications/Install OS X" --volume /Volumes/Untitled --applicationpath "/Applications/Install OS X"

Where 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.