Creates Bootable USB for Mac OS Lion to Monterey (Excluding Mavericks)

Install_USB_Maker.sh

#!/usr/bin/env bash

# Install_USB_Maker.sh
# Copyright (c) 2020 - 2024 Dayo Akanji
# - dakanji@users.sourceforge.net
# Portions Copyright (c) Jeff Geerling
# - https://github.com/geerlingguy/macos-virtualbox-vm/blob/master/LICENSE
#
# MIT License

# Derived from:
#    * https://apple.stackexchange.com/a/389830
#    * https://github.com/geerlingguy/macos-virtualbox-vm/blob/master/prepare-iso.sh
#
# 1. Download Lion to Monterey (Excluding Mavericks)
#    * From    : https://support.apple.com/HT211683 (Lion to Sierra or Links to App Store)
#    *         : https://github.com/corpnewt/gibMacOS (High Sierra to Monterey)
# 2. Use Disk Utility to format a USB stick partition:
#    * Name    : USB_Maker
#    * Size    : Easiest to assume 16 GB but see details below:
#    *         : 08 GB (Min) For Lion to Sierra (if via Install DMG)
#    *         : 16 GB (Min) For Yosemite to Sierra (if via Installer App)
#    *         : 16 GB (Min) For High Sierra to Monterey (Always Installer App)
#    * Format  : Mac OS Extended Journaled (HFS+)
# 3. Make the downloaded "Install" package available to this script:
#    * For Lion to Sierra:
#    *     Run the the downloaded "Install DMG" file to mount it
#    *     Close the Finder window for the DMG if displayed
#    * For High Sierra to Monterey
#    *  or Yosemite to Sierra if using "Install App":
#    *     Place the install app in the 'Applications' folder
#    *     This can be done manually or by running the downloaded package
#    *     Placing manually in the folder containing this script also works
#    *     Installer Apps in the folder containing this script take precedence
# 4. Make this script executable and run it in Terminal:
#    * Unzip the package to show the script file in Finder
#    * Type  "chmod +x" without quotes, add a space, then drag the script file from Finder unto Terminal and press "Enter"
#    * Type  "sh" without quotes, add a space, then drag the script file from Finder unto Terminal again and press "Enter"
# 5. Install Mac OS with the USB Installer once done
#    * Name    : Install_{{MAC_OS_NAME}}

## CUSTOM COLOURS ##
msg_status() {
	printf "\033[0;35m$1\033[0m\n"
}
msg_info() {
	printf "\033[0;33m$1\033[0m\n"
}
msg_error() {
	printf "\033[0;31m$1\033[0m\n"
}

enter_msg() {
	one=${1:-SkipNb}
	two=${2:-SkipAs}

	if [ "${two}" != 'WithAs' ] ; then
		if [ "${one}" != 'WithNb' ] ; then
			msg_info '    Type password and press "Enter" if prompted'
		else
			msg_info 'NB: Type password and press "Enter" if prompted'
		fi
	else
		if [ "${one}" != 'WithNb' ] ; then
			msg_info '    Type password as prompted and press "Enter"'
		else
			msg_info 'NB: Type password as prompted and press "Enter"'
		fi
	fi

	msg_info '    Your password is not displayed while typing'
}

chill_msg() {
	msg_info 'NB: Patience ... This takes a while to complete'
	enter_msg ;
}

# createISO by Jeff Geerling as modified by Dayo Akanji
# This function creates the ISO image.
# Inputs:  $1 = The name of the installer - located in Applications folder or local folder/PATH.
function createISO() {
	local installerAppName
	local isoName
	local error
	local SparseImageFile
	local InstallAppVol
	local InstallAppBaseSystem

	if [ -e "${SCRIPT_DIR}/${1}" ] ; then
		installerAppName="${SCRIPT_DIR}/${1}"
	elif [ -e "/Applications/${1}" ] ; then
		installerAppName="/Applications/${1}"
	else
		echo; echo
		msg_info 'ERROR!!'
		msg_error 'Could Not Find Installer App'
		runExit 'Error' ;
	fi

	# Remove Spaces in 'INSTALL_NAME' and use as ISO name
	isoName=$( echo "${INSTALL_NAME}" | sed 's/ //g' )
	error=0
	SparseImageFile="${INSTALL_TEMP}/${isoName}.sparseimage"
	InstallAppVol='/Volumes/install_app'
	InstallAppBaseSystem="${installerAppName}/Contents/SharedSupport/BaseSystem"

	sudo -v
	msg_info "Using Installer App:- '${installerAppName}'"
	msg_status 'STEP 01 of 13: Create a Blank 16GB Single Partition Apple Partition Map ISO Image'
	# Create INSTALL_TEMP folder
	mkdir -p "${INSTALL_TEMP}"
	# Just in case - delete any previous sparseimage
	[ -e "${SparseImageFile}" ] && rm -f "${SparseImageFile}"
	# increased size to 16G - 8G is too small for Catalina
	hdiutil create -o "${INSTALL_TEMP}/${isoName}" -size 16g -layout SPUD -fs HFS+J -type SPARSE

	sudo -v; echo
	msg_status 'STEP 02 of 13: Mount Installer Image'
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		hdiutil attach "${SparseImageFile}" -noverify -nobrowse -mountpoint  "${InstallAppVol}"
	elif [ -e "${installerAppName}" ] ; then
		hdiutil attach "${installerAppName}/Contents/SharedSupport/InstallESD.dmg" -noverify -nobrowse -mountpoint  "${InstallAppVol}"
        error=$?
	else
		error=999
	fi

	if [ ${error} -ne 0 ] ; then
		echo; echo
		msg_info 'ERROR!!'
		msg_error "Failed to mount the InstallESD.dmg from the installer at ${installerAppName}"
		msg_error "Exiting on 'Error Code: ${error}'"
		runExit 'Error' ;
	fi

	sudo -v; echo
	msg_status 'STEP 03 of 13: Mount Sparse Bundle for Package Addition'
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		echo "N/A ... Skipped for ${INSTALL_NAME}"
	else
		hdiutil attach "${SparseImageFile}" -noverify -nobrowse -mountpoint '/Volumes/install_build'
	fi

	sudo -v; echo
	msg_status 'STEP 04 of 13: Restore Base System into '${isoName}' ISO Image'
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		echo "N/A ... Skipped for ${INSTALL_NAME}"
	elif [ "${isoName}" == 'Catalina' ] || [ "${isoName}" == 'Mojave' ] || [ "${isoName}" == 'HighSierra' ] ; then
		# Note by Jeff Geerling
		#following asr command returns an error and prints:
		#"Personalization succeeded"
		#"asr: Couldn't personalize volume /Volumes/macOS Base System - Operation not permitted"
		#I disabled SIP and the error still occurs.
		#This was reported in Issue #73 for Mojave
		#Added '|| true' for now to prevent the script from exiting as the steps that follow still seem to work fine for Catalina
		sudo asr restore -source  "${InstallAppBaseSystem}.dmg" -target '/Volumes/install_build' -noprompt -noverify -erase  || true
	else
		sudo asr restore -source  "${InstallAppVol}/BaseSystem.dmg" -target '/Volumes/install_build' -noprompt -noverify -erase
	fi

	sudo -v; echo
	msg_status 'STEP 05 of 13: Remove Package Link and Replace with Actual Files'
	chill_msg ;
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		echo "N/A ... Skipped for ${INSTALL_NAME}"
	elif [ "${isoName}" == 'Catalina' ] || [ "${isoName}" == 'Mojave' ] || [ "${isoName}" == 'HighSierra' ] ; then
		ditto -V  "${InstallAppVol}/Packages" "${VOL_BASE_DIR}/System/Installation/"
	else
		rm -v "${VOL_BASE_DIR}/System/Installation/Packages"
		cp -rpv "${InstallAppVol}/Packages" "${VOL_BASE_DIR}/System/Installation/"
	fi

	sudo -v; echo
	msg_status "STEP 06 of 13: Copy '${INSTALL_TARGET}' Dependencies"
	enter_msg 'WithNb' ;
	sudo -v
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		CurrentMacOS=$(sw_vers -productVersion)
		if [[ "${CurrentMacOS}" == *"10.12."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.11."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.10."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.9."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.8."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.7."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.6."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.5."* ]] ; then
			PostHiSierra='False'
		elif [[ "${CurrentMacOS}" == *"10.4."* ]] ; then
			PostHiSierra='False'
		else
			PostHiSierra='True'
		fi

		if [ "${PostHiSierra}" == 'True' ] ; then
			sudo "${installerAppName}/Contents/Resources/createinstallmedia" --volume "${InstallAppVol}" --nointeraction
		else
			sudo "${installerAppName}/Contents/Resources/createinstallmedia" --volume "${InstallAppVol}" --applicationpath "${installerAppName}"
		fi
	elif [ "${isoName}" == 'Catalina' ] || [ "${isoName}" == 'Mojave' ] || [ "${isoName}" == 'HighSierra' ] ; then
		ditto -V  "${InstallAppBaseSystem}.chunklist" "${VOL_BASE_SYS}.chunklist"
		ditto -V  "${InstallAppBaseSystem}.dmg" "${VOL_BASE_SYS}.dmg"
	else
		cp -rpv  "${InstallAppVol}/BaseSystem.chunklist" "${VOL_BASE_SYS}.chunklist"
		cp -rpv  "${InstallAppVol}/BaseSystem.dmg" "${VOL_BASE_SYS}.dmg"
	fi

	sudo -v; echo
	msg_status 'STEP 07 of 13: Unmount Installer Image'
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		hdiutil detach "/Volumes/Install macOS ${INSTALL_NAME}" -force # NOTE: force because "Resource busy"
	else
		hdiutil detach "${InstallAppVol}"
	fi

	sudo -v; echo
	msg_status 'STEP 08 of 13: Unmount Sparse Bundle'
	if [ "${isoName}" == 'Monterey' ] || [ "${isoName}" == 'BigSur' ] ; then
		echo "N/A ... Skipped for ${INSTALL_NAME}"
	else
		hdiutil detach "${VOL_BASE_DIR}/"
	fi

	sudo -v; echo
	msg_status "STEP 09 of 13: Resize '${isoName}' Sparse Bundle to Remove Free Space"
	hdiutil resize -size `hdiutil resize -limits "${SparseImageFile}" | tail -n 1 | awk '{ print $1 }'`b "${SparseImageFile}"
	echo "Resized '${isoName}' Sparse Bundle"

	sudo -v; echo
	msg_status "STEP 10 of 13: Convert '${isoName}' Sparse Bundle to ISO/CD Master"
	chill_msg ;
	hdiutil convert "${SparseImageFile}" -format UDTO -o "${INSTALL_TEMP}/${isoName}"
	sudo rm -vf "${SparseImageFile}"

	sudo -v; echo
	msg_status 'STEP 11 of 13: Convert ISO/CD Master to Regular Image'
	sudo rm -rf "${HOME}/Desktop/${INSTALL_TARGET}.iso" || true
	sudo mv -vf "${INSTALL_TEMP}/${isoName}.cdr" "${INSTALL_TEMP}/${INSTALL_TARGET}.iso"

	sudo -v; echo
	msg_status "STEP 12 of 13: Rename '${INSTALL_ID}'..."
	sudo diskutil rename "${INSTALL_ID}" "${INSTALL_TARGET}"

	sudo -v; echo
	msg_status 'STEP 13 of 13: Finishing'
	chill_msg ;
	sudo mv -vf "${INSTALL_TEMP}/${INSTALL_TARGET}.iso" "${HOME}/Desktop/${INSTALL_TARGET}.iso"
	sudo rm -rf "${INSTALL_TEMP}" || true
	echo 'Cleared Temp Files'

    echo; echo
	msg_info 'Complete'
	echo; echo

	msg_status 'NB: Use a tool such as BalenaEtcher to create bootable USB'
	msg_status "    From: '${HOME}/Desktop/${INSTALL_TARGET}.iso'"
	runExit ;
}

# installerExists by Jeff Geerling
# Returns 0 if the installer was found locally or in '/Applications'.  1 if not.
function installerExists() {
	local installerAppName
	local result

	installerAppName="${1}"
	result=1
	if [ -e "${SCRIPT_DIR}/${installerAppName}" ] ; then
		result=0
	elif [ -e "/Applications/${installerAppName}" ] ; then
		result=0
	fi
	return ${result}
}

## EXIT HANDLER ##
runExit() {
	flag=${1:-Norm}
	if [ "${flag}" != 'Norm' ] ; then
		sudo rm -rf "${INSTALL_TEMP}"
		echo; echo
		msg_info "Runtime Error!!"
		msg_error "Could Not Create USB Installer"
		echo; echo
		exit 1
	else
		echo; echo
		msg_info 'All Done!'
		echo; echo
		msg_info '################################'
		msg_info ' ##  Create Mac OS Install USB ##'
		msg_info '  ################################'
		echo; echo
		exit 0
	fi
}

## ERROR HANDLER ##
runErr() {
	sudo rm -rf "${INSTALL_TEMP}"
	echo; echo
	msg_info "Runtime Error!!"
	msg_error "Could Not Create USB Installer"
	echo; echo
	exit 1
}
trap runErr ERR


##
## Start Procedural Code
##
INSTALL_TARGET='NotSet'
INSTALL_BASIC='Install OS X'
INSTALL_TYPE='NotSet'
INSTALL_NAME='NotSet'
INSTALL_TEMP='/tmp/VersionOSX'
INSTALL_BASE='OS X Base System'
INSTALL_APP='Mac OS Install'
INSTALL_ESD='/Volumes/TMP_ESD'
INSTALL_ID='USB_Maker'
INSTALL_X='InstallMacOSX'
TYPE_OSX="macOS"
TMP_STR='NotSet'
USE_APP='NotSet'
VOL_BASE_SYS='NotSet'
VOL_BASE_DIR='NotSet'

if [ ! -d "/Volumes/${INSTALL_ID}" ] ; then
	err_msg="Connect a correctly sized USB stick labelled as '${INSTALL_ID}' and rerun this script"
	echo; echo
	msg_info 'ERROR!!'
	msg_error "${err_msg}"
	echo; echo
	exit 1
fi

# Resolve TMP_SOURCE until the file is no longer a symlink
TMP_SOURCE=${BASH_SOURCE[0]}
while [ -L "${TMP_SOURCE}" ]; do
	DIR=$( cd -P "$( dirname "${TMP_SOURCE}" )" >/dev/null 2>&1 && pwd )
	TMP_SOURCE=$(readlink "${TMP_SOURCE}")
	# if ${TMP_SOURCE} is relative symlink, resolve relative to symlink file location
	[[ ${TMP_SOURCE} != /* ]] && TMP_SOURCE=${DIR}/${TMP_SOURCE}
done
SCRIPT_DIR=$( cd -P "$( dirname "${TMP_SOURCE}" )" >/dev/null 2>&1 && pwd )

echo; echo
enter_msg 'WithNb' 'WithAs' ;

sudo clear
echo; echo
msg_info '  ################################'
msg_info ' ##  Create Mac OS Install USB ##'
msg_info '################################'

echo; echo
msg_info '## STAGE 1 of 4: Confirm Install Target ##'
msg_info '------------------------------------------'
msg_status 'STEP 01 of 02: Set Target Mac OS Version'
PS3='Enter Corresponding Number for Mac OS Version or Exit:- '
options=('Monterey' 'Big Sur' 'Catalina' 'Mojave' 'High Sierra' 'Sierra' 'El Capitan' 'Yosemite' 'Mavericks' 'Mountain Lion' 'Lion' 'Exit')
select opt in "${options[@]}"
do
	case $opt in
		'Monterey' | 'Big Sur' | 'Catalina' | 'Mojave' | 'High Sierra')
			INSTALL_NAME="${opt}"
			USE_APP='True'
        break
        ;;
    	'Sierra')
			INSTALL_X='InstallOS'
			INSTALL_NAME="${opt}"
			USE_APP='Maybe'
			INSTALL_BASIC='Install macOS'
			INSTALL_APP="Install Mac OS ${INSTALL_NAME}.app"
        break
        ;;
    	'El Capitan' | 'Yosemite')
			INSTALL_NAME="${opt}"
			USE_APP='Maybe'
			INSTALL_APP="Install Mac OS X ${INSTALL_NAME}.app"
        break
        ;;
        'Mountain Lion')
			INSTALL_NAME="${opt}"
			USE_APP='False'
			INSTALL_BASE='Mac OS X Base System'
			INSTALL_BASIC='Install Mac OS X'
			INSTALL_APP="Install OS X ${INSTALL_NAME}.app"
		break
        ;;
        'Lion')
			INSTALL_NAME="${opt}"
			USE_APP='False'
			INSTALL_BASE='Mac OS X Base System'
			INSTALL_BASIC='Install Mac OS X'
			INSTALL_APP="Install Mac OS X ${INSTALL_NAME}.app"
		break
        ;;
        'Mavericks')
			TMP_STR='Exit'
			INSTALL_NAME="${opt}"
		break
		;;
		'Exit')
			TMP_STR='Exit'
        break
        ;;
        *)
			echo; echo
			msg_info 'ERROR!!'
            msg_error "Invalid Selection:- '${REPLY}'"
			echo; echo
			exit 1
        ;;
    esac
done

sudo -v; echo
msg_status 'STEP 02 of 02: Check Selected Item'
echo "'${INSTALL_NAME}' Selected"
if [ "${TMP_STR}" == 'Exit' ] ; then
	if [ "${INSTALL_NAME}" == 'Mavericks' ] ; then
		echo; echo
		msg_info 'NOTE:'
		msg_status 'Mavericks Installer *IS NOT* Supported'
	fi
	runExit 'Exit' ;
fi

sudo -v; echo
msg_info 'Completed Stage 1'

echo; echo
msg_info '## STAGE 2 of 4: Confirm Prerequisites ##'
msg_info '-----------------------------------------'
msg_status 'STEP 01 of 02: Validate Installer Name...'
INSTALL_TARGET=$( echo "Install_${INSTALL_NAME}" | sed 's/ //g' )
INSTALL_STICK="/Volumes/${INSTALL_TARGET}"
if [ ! -d "${INSTALL_STICK}" ] ; then
	gotError='False'
	echo 'Validated'
else
	err_msg="Unmount conflicting '${INSTALL_TARGET}' volume and rerun this script"
	gotError='True'
fi

TMP_STR='NotSet'
if [ "${gotError}" == 'False' ] ; then
	sudo -v; echo
	msg_status 'STEP 02 of 02: Validate Misc Other...'
	# Check if using installer app for Yosemite to Sierra
	if [ "${USE_APP}" == 'Maybe' ] ; then
		USE_APP='False'
		if [ "${INSTALL_NAME}" == 'Sierra' ] ; then
			TMP_STR='macOS'
		elif [ "${INSTALL_NAME}" == 'El Capitan' ] || [ "${INSTALL_NAME}" == 'Yosemite' ] ; then
			TMP_STR='OS X'
		fi
		if [ "${TMP_STR}" != 'NotSet' ] ; then
			if installerExists "Install ${TMP_STR} ${INSTALL_NAME}.app" ; then
				USE_APP='True'
			fi
		fi
	fi
	TMP_STR='NotSet'
	if [ "${USE_APP}" == 'False' ] ; then
		# Ensure DMG is mounted
		if [ ! -d "/Volumes/${INSTALL_BASIC}" ] ; then
			err_msg="Mount the ${INSTALL_NAME} '${INSTALL_X}.dmg' file and rerun this script"
			gotError='True'
		fi
	else
		# Note by Jeff Geerling
		# Eject installer disks in case opened after download from App Store
		# grep "partition_scheme" because "partition" finds too many lines
		for disk in $(hdiutil info | grep /dev/disk | grep partition_scheme | cut -f 1); do
			hdiutil detach -force ${disk}
		done
	fi
fi

# Error/Exit Handling
if [ "${gotError}" == 'False' ] ; then
	echo 'Validated'
else
	echo; echo
	msg_info 'ERROR!!'
	msg_error "${err_msg}"
	runExit 'Error' ;
fi

sudo -v; echo
msg_info 'Completed Stage 2'

if [ "${USE_APP}" == 'True' ] ; then
	echo; echo
	msg_info '## STAGE 3 of 4: Find Installer ##'
	msg_info '----------------------------------'
	msg_status 'STEP 01 of 01: Checking for Installer App...'
    if [[ "${INSTALL_NAME}" == 'Monterey' || "${INSTALL_NAME}" == 'Big Sur' || "${INSTALL_NAME}" == 'Catalina' || "${INSTALL_NAME}" == 'Mojave' ]] ; then
		if installerExists "Install macOS ${INSTALL_NAME}.app" ; then
			INSTALL_TYPE='macOS'
			TYPE_OSX='macOS'
		fi
	elif [[ "${INSTALL_NAME}" == 'High Sierra' || "${INSTALL_NAME}" == 'Sierra' ]] ; then
		# DA-TAG: The Sierras are odd with 'macOS' app name but 'OS X' elsewhere
		if installerExists "Install macOS ${INSTALL_NAME}.app" ; then
			INSTALL_TYPE='macOS'
			TYPE_OSX='OS X'
		fi
    elif [[ "${INSTALL_NAME}" == 'El Capitan' || "${INSTALL_NAME}" == 'Yosemite' ]] ; then
		if installerExists "Install OS X ${INSTALL_NAME}.app" ; then
			INSTALL_TYPE='OS X'
			TYPE_OSX='OS X'
		fi
	fi
	if [ "${TYPE_OSX}" == 'NotSet' ] ; then
		echo; echo
		msg_info 'ERROR!!'
		msg_error "Could not find valid installer app file"
		runExit 'Error' ;
	fi
	echo "Found Installer App for ${INSTALL_NAME}"
	VOL_BASE_DIR="/Volumes/${TYPE_OSX} Base System"
	VOL_BASE_SYS="${VOL_BASE_DIR}/BaseSystem"
	TMP_STR='NotSet'

	sudo -v; echo
	msg_info 'Completed Stage 3'

	echo; echo
	msg_info '## STAGE 4 of 4: Create ISO Image ##'
	msg_info '------------------------------------'
	createISO "Install ${INSTALL_TYPE} ${INSTALL_NAME}.app"
else
	echo; echo
	msg_info '## STAGE 3 of 4: Deconstruct Installer ##'
	msg_info '-----------------------------------------'
	msg_status 'STEP 01 of 03: Creating Temp Store...'
	chill_msg ;
    sudo rm -rfv "${INSTALL_TEMP}"
	pkgutil --expand "/Volumes/${INSTALL_BASIC}/${INSTALL_X}.pkg" "${INSTALL_TEMP}"
    echo 'Created Temp Store'

	sudo -v; echo
	msg_status 'STEP 02 of 03: Ejecting Install DMG...'
	sudo diskutil eject "${INSTALL_BASIC}"

	sudo -v; echo
	msg_status 'STEP 03 of 03: Preparing and Attaching InstallESD...'
	hdiutil attach "${INSTALL_TEMP}/${INSTALL_X}.pkg/InstallESD.dmg"  -noverify -nobrowse -mountpoint "${INSTALL_ESD}"

    sudo -v; echo
    msg_info 'Completed Stage 3'

    echo; echo
    msg_info '## STAGE 4 of 4: Repackage Installer ##'
    msg_info '---------------------------------------'
    msg_status 'STEP 01 of 04: Preparing Target Disk...'
    chill_msg ;
	sudo asr restore -source "${INSTALL_ESD}/BaseSystem.dmg" -target "/Volumes/${INSTALL_ID}" -noprompt -noverify -erase || true
	diskutil rename "${INSTALL_BASE}" "${INSTALL_TARGET}"

	sudo -v; echo
	msg_status 'STEP 02 of 04: Reconstituting ESD...'
	chill_msg ;
	rm -v "${INSTALL_STICK}/System/Installation/Packages"
	cp -rpv "${INSTALL_ESD}/BaseSystem.dmg" "${INSTALL_STICK}/"
	cp -rpv "${INSTALL_ESD}/BaseSystem.chunklist" "${INSTALL_STICK}/"
	sudo -v; echo
	cp -rpv "${INSTALL_ESD}/Packages" "${INSTALL_STICK}/System/Installation"
	hdiutil detach "${INSTALL_ESD}" || true

	sudo -v; echo
	msg_status 'STEP 03 of 04: Relabelling Volume and Updating VolumeIcon...'
	sudo bless --folder "${INSTALL_STICK}/System/Library/CoreServices" --label "${INSTALL_TARGET}"
	InstallIcon="${INSTALL_STICK}/${INSTALL_APP}/Contents/Resources/InstallAssistant.icns"
	if [ ! -f "${InstallIcon}" ]; then
		INSTALL_APP="${INSTALL_STICK}/Install OS X ${INSTALL_NAME}.app"
		InstallIcon="${INSTALL_APP}/Contents/Resources/InstallAssistant.icns"
		if [ ! -f "${InstallIcon}" ]; then
			INSTALL_APP="${INSTALL_STICK}/Install Mac OS X ${INSTALL_NAME}.app"
			InstallIcon="${INSTALL_APP}/Contents/Resources/InstallAssistant.icns"
			if [ ! -f "${InstallIcon}" ]; then
				INSTALL_APP="${INSTALL_STICK}/Install Mac OS ${INSTALL_NAME}.app"
				InstallIcon="${INSTALL_APP}/Contents/Resources/InstallAssistant.icns"
				if [ ! -f "${InstallIcon}" ]; then
					INSTALL_APP="${INSTALL_STICK}/Install macOS ${INSTALL_NAME}.app"
					InstallIcon="${INSTALL_APP}/Contents/Resources/InstallAssistant.icns"
				fi
			fi
		fi
	fi
	if [ -f "${InstallIcon}" ]; then
		cp -v "${InstallIcon}" "${INSTALL_STICK}/.VolumeIcon.icns"
	else
		echo 'Skipped VolumeIcon Update ... Not Found'
	fi

	sudo -v; echo
	msg_status 'STEP 04 of 04: Finishing...'
	cd "${HOME}" || true
	sudo rm -rf "${INSTALL_TEMP}" || true

	echo
	msg_info 'Completed Stage 4'
	runExit ;
fi

Dayo why did you skip Mavericks? Some people have legitimate Mavericks apps.

Hi ... Didn't have one at the time but IIRC, the one I did get had a different structure and initial attempts failed.
Didn't try too hard to sort it out and moved on given that Apple was not offering it like the others anyway.

Hi,thanks for this scripts.I made several bootable macos,but it's wired that some Volume icons do not show up,see attched photo.For Lion,when running the scripts,it shows:Skipped ... VolumeIcon not found.I check the path of InstallAssistant.icns,this icns exists

Is this path existing:

/Volumes/Lion Installer/Install OS X Lion/Contents/Resources/InstallAssistant.icns

@onekingnqueen ... Thanks for the report.

Should be fixed now.