@see http://lifehacker.com/how-to-create-an-os-x-mavericks-usb-installation-drive-1450280026
- Download OS X Mavericks from the Mac App Store, if you haven't already. If it tries to start the installation, just close it.
- Insert your USB drive (you'll need one that's 8GB or larger) and open Disk Utility.
- Select your drive in the sidebar and go to the Erase tab. Format the drive as "Mac OS Extended (Journaled)" and name the drive "Untitled." (Note: if you already have a drive or partition named "Untitled" connected to your computer, name it something else and change the corresponding variable in step 5's terminal command, or you might experience data loss!).
- Click the Erase button and wait for Disk Utility to finish.
- Close Disk Utility and open up a Terminal window. Copy and paste the command into the Terminal.
sudo /Applications/Install\ OS\ X\ Mavericks.app/Contents/Resources/createinstallmedia --volume /Volumes/Untitled --applicationpath /Applications/Install\ OS\ X\ Mavericks.app --nointe