Create a bootable ISO from the OS X Mavericks app

mavericks-iso.sh

#!/bin/sh
# Create a bootable ISO from the OS X Mavericks app
# http://thezinx.com/misc/trend/create-bootable-dmg-iso-mavericks-app/

if [ ! -f /Applications/Install\ OS\ X\ Mavericks.app/Contents/SharedSupport/InstallESD.dmg ]; then
    echo "Download the OS X Mavericks App and then rerun this script."
    open "https://itunes.apple.com/us/app/os-x-mavericks/id675248567"
    exit 1
fi

# Mount the installer image
hdiutil attach /Applications/Install\ OS\ X\ Mavericks.app/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app

# Convert the boot image to a sparse bundle
hdiutil convert /Volumes/install_app/BaseSystem.dmg -format UDSP -o /tmp/Mavericks

# Increase the sparse bundle capacity to accommodate the packages
hdiutil resize -size 8g /tmp/Mavericks.sparseimage

# Mount the sparse bundle for package addition
hdiutil attach /tmp/Mavericks.sparseimage -noverify -nobrowse -mountpoint /Volumes/install_build

# Remove Package link and replace with actual files
rm -v /Volumes/install_build/System/Installation/Packages
cp -rpv /Volumes/install_app/Packages /Volumes/install_build/System/Installation/

# Unmount the installer image
hdiutil detach /Volumes/install_app

# Unmount the sparse bundle
hdiutil detach /Volumes/install_build

# Resize the partition in the sparse bundle to remove any free space
hdiutil resize -size `hdiutil resize -limits /tmp/Mavericks.sparseimage | tail -n 1 | awk '{ print $1 }'`b /tmp/Mavericks.sparseimage

# Convert the sparse bundle to ISO/CD master
hdiutil convert /tmp/Mavericks.sparseimage -format UDTO -o /tmp/Mavericks

# Remove the sparse bundle
rm /tmp/Mavericks.sparseimage

# Rename the ISO and move it to the desktop
mv -v /tmp/Mavericks.cdr ~/Desktop/Mavericks.iso

Thanks to http://thezinx.com/misc/trend/create-bootable-dmg-iso-mavericks-app/