This will change ‘ BootDisk‘ to ‘ OS X Base System‘ This puts you back in the Finder in front of the newly mounted InstallESD.dmg, go back to Terminal and clone the BaseSystem.dmg to the remote USB drive sudo asr restore -source /Volumes/OS\ X\ Install\ ESD/BaseSystem.dmg -target /Volumes/BootDisk/ -erase -noverify Swap to the newly mounted image cd /Volumes/InstallESD.dmg Mount the InstallESD.dmg buried deep in the app hdiutil attach /Applications/Install\ OS\ X\ Mavericks.app/Contents/SharedSupport/InstallESD.dmg -noverify Just for the crazy ones……after Mavericks is downloaded….and again this assumes you external disk is named BootDisk If you want all to return back to normal and hide the system files run a couple more commands in the Terminal defaults write AppleShowAllFiles FALSE killall Finder How to create the OSX 10.9 Mavericks Bootable Drive just via Terminal
