Create OS X Mavericks Bootable USB Drive from AppStore Release

1 Download Mavericks installer

Download from Mac App Store or anywhere.
The default folder name is ‘Install OS X Mavericks.app‘ not accessible directly from Mac Finder. There’s a DMG file locate at ‘Install OS X Mavericks.app/Contents/SharedSupport/InstallESD.dmg‘, this DMG contains all files we need.

2 Mount DMG directly from Terminal

Open Terminals,

The DMG will be mount at /Volumes/OS X Install ESD/

3 Mount BaseSystem.dmg from Terminal

Open Terminals,

The DMG will be mount at /Volumes/OS X Base System/

4 Insert your usb flash drive

8GB or larger.

5 Run ‘Disk Utility’

Press control + space, enter ‘disk utility’, run the application.

6 Restore DMG to USB Driver

Format flash drive

Left part of Disk Utility, choose your usb drive(not partition under the drive);
Right part, Erase, Format set to Mac OS Extended (Journaled).

Restore

Left, choose ‘OS X Base System’ under the BaseSystem.dmg;
Right, Restore;
Left, choose partition under your flash drive;
Right drag partition under your flash drive to Destination from left;
Right, Restore.
Burned drive will be automatically mounted at /Volume/OS X Base System 1/.

7 Copy packages to USB drive

System/Installation/Packages in ‘OS X Base System’ is a symlink, remove it and replace with Packages in ‘OS X Install ESD’.

8 Install
Boot your mac by holding ‘alt/option’, choose the usb drive and wait, follow instructions in OS X Installer.

Create OS X Mavericks Bootable USB Drive from AppStore Release by @sskaje: https://sskaje.me/2013/10/create-os-x-mavericks-bootable-usb-drive-from-appstore-release/