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prepare-iso.sh
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#!/bin/bash
#
# This script will create a bootable ISO image from the installer app for:
#
# - Yosemite (10.10)
# - El Capitan (10.11)
# - Sierra (10.12)
# - High Sierra (10.13)
# - Mojave (10.14)
set -e
#
# createISO
#
# This function creates the ISO image for the user.
# Inputs: $1 = The name of the installer - located in your Applications folder or in your local folder/PATH.
# $2 = The Name of the ISO you want created.
function createISO()
{
if [ $# -eq 2 ] ; then
local installerAppName=${1}
local isoName=${2}
local error=0
# echo Debug: installerAppName = ${installerAppName} , isoName = ${isoName}
echo
echo Mount the installer image
echo -----------------------------------------------------------
if [ -e "${installerAppName}" ] ; then
echo $ hdiutil attach "${installerAppName}"/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app
hdiutil attach "${installerAppName}"/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app
error=$?
elif [ -e /Applications/"${installerAppName}" ] ; then
echo $ hdiutil attach /Applications/"${installerAppName}"/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app
hdiutil attach /Applications/"${installerAppName}"/Contents/SharedSupport/InstallESD.dmg -noverify -nobrowse -mountpoint /Volumes/install_app
error=$?
installerAppName="/Applications/${installerAppName}"
else
echo Installer Not found!
error=1
fi
if [ ${error} -ne 0 ] ; then
echo "Failed to mount the InstallESD.dmg from the instaler at ${installerAppName}. Exiting. (${error})"
return ${error}
fi
echo
echo Create ${isoName} blank ISO image with a Single Partition - Apple Partition Map
echo --------------------------------------------------------------------------
echo $ hdiutil create -o /tmp/${isoName} -size 8g -layout SPUD -fs HFS+J -type SPARSE
hdiutil create -o /tmp/${isoName} -size 8g -layout SPUD -fs HFS+J -type SPARSE
echo
echo Mount the sparse bundle for package addition
echo --------------------------------------------------------------------------
echo $ hdiutil attach /tmp/${isoName}.sparseimage -noverify -nobrowse -mountpoint /Volumes/install_build
hdiutil attach /tmp/${isoName}.sparseimage -noverify -nobrowse -mountpoint /Volumes/install_build
echo
echo Restore the Base System into the ${isoName} ISO image
echo --------------------------------------------------------------------------
if [ "${isoName}" == "HighSierra" ] || [ "${isoName}" == "Mojave" ] ; then
echo $ asr restore -source "${installerAppName}"/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
asr restore -source "${installerAppName}"/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
else
echo $ asr restore -source /Volumes/install_app/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
asr restore -source /Volumes/install_app/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase
fi
echo
echo Remove Package link and replace with actual files
echo --------------------------------------------------------------------------
if [ "${isoName}" == "HighSierra" ] || [ "${isoName}" == "Mojave" ] ; then
echo $ ditto -V /Volumes/install_app/Packages /Volumes/OS\ X\ Base\ System/System/Installation/
ditto -V /Volumes/install_app/Packages /Volumes/OS\ X\ Base\ System/System/Installation/
else
echo $ rm /Volumes/OS\ X\ Base\ System/System/Installation/Packages
rm /Volumes/OS\ X\ Base\ System/System/Installation/Packages
echo $ cp -rp /Volumes/install_app/Packages /Volumes/OS\ X\ Base\ System/System/Installation/
cp -rp /Volumes/install_app/Packages /Volumes/OS\ X\ Base\ System/System/Installation/
fi
echo
echo Copy macOS ${isoName} installer dependencies
echo --------------------------------------------------------------------------
if [ "${isoName}" == "HighSierra" ] || [ "${isoName}" == "Mojave" ] ; then
echo $ ditto -V "${installerAppName}"/Contents/SharedSupport/BaseSystem.chunklist /Volumes/OS\ X\ Base\ System/BaseSystem.chunklist
ditto -V "${installerAppName}"/Contents/SharedSupport/BaseSystem.chunklist /Volumes/OS\ X\ Base\ System/BaseSystem.chunklist
echo $ ditto -V "${installerAppName}"/Contents/SharedSupport/BaseSystem.dmg /Volumes/OS\ X\ Base\ System/BaseSystem.dmg
ditto -V "${installerAppName}"/Contents/SharedSupport/BaseSystem.dmg /Volumes/OS\ X\ Base\ System/BaseSystem.dmg
else
echo $ cp -rp /Volumes/install_app/BaseSystem.chunklist /Volumes/OS\ X\ Base\ System/BaseSystem.chunklist
cp -rp /Volumes/install_app/BaseSystem.chunklist /Volumes/OS\ X\ Base\ System/BaseSystem.chunklist
echo $ cp -rp /Volumes/install_app/BaseSystem.dmg /Volumes/OS\ X\ Base\ System/BaseSystem.dmg
cp -rp /Volumes/install_app/BaseSystem.dmg /Volumes/OS\ X\ Base\ System/BaseSystem.dmg
fi
echo
echo Unmount the installer image
echo --------------------------------------------------------------------------
echo $ hdiutil detach /Volumes/install_app
hdiutil detach /Volumes/install_app
echo
echo Unmount the sparse bundle
echo --------------------------------------------------------------------------
echo $ hdiutil detach /Volumes/OS\ X\ Base\ System/
hdiutil detach /Volumes/OS\ X\ Base\ System/
echo
echo Resize the partition in the sparse bundle to remove any free space
echo --------------------------------------------------------------------------
echo $ hdiutil resize -size `hdiutil resize -limits /tmp/${isoName}.sparseimage | tail -n 1 | awk '{ print $1 }'`b /tmp/${isoName}.sparseimage
hdiutil resize -size `hdiutil resize -limits /tmp/${isoName}.sparseimage | tail -n 1 | awk '{ print $1 }'`b /tmp/${isoName}.sparseimage
echo
echo Convert the ${isoName} sparse bundle to ISO/CD master
echo --------------------------------------------------------------------------
echo $ hdiutil convert /tmp/${isoName}.sparseimage -format UDTO -o /tmp/${isoName}
hdiutil convert /tmp/${isoName}.sparseimage -format UDTO -o /tmp/${isoName}
echo
echo Remove the sparse bundle
echo --------------------------------------------------------------------------
echo $ rm /tmp/${isoName}.sparseimage
rm /tmp/${isoName}.sparseimage
echo
echo Rename the ISO and move it to the desktop
echo --------------------------------------------------------------------------
echo $ mv /tmp/${isoName}.cdr ~/Desktop/${isoName}.iso
mv /tmp/${isoName}.cdr ~/Desktop/${isoName}.iso
fi
}
#
# installerExists
#
# Returns 0 if the installer was found either locally or in the /Applications directory. 1 if not.
#
function installerExists()
{
local installerAppName=$1
local result=1
if [ -e "${installerAppName}" ] ; then
result=0
elif [ -e /Applications/"${installerAppName}" ] ; then
result=0
fi
return ${result}
}
#
# Main script code
#
# Eject installer disk in case it was opened after download from App Store
for disk in $(hdiutil info | grep /dev/disk | grep partition | cut -f 1); do
hdiutil detach -force ${disk}
done
# See if we can find an eligible installer.
# If successful, then create the iso file from the installer.
if installerExists "Install macOS Mojave.app" ; then
createISO "Install macOS Mojave.app" "Mojave"
else
if installerExists "Install macOS High Sierra.app" ; then
createISO "Install macOS High Sierra.app" "HighSierra"
else
if installerExists "Install macOS Sierra.app" ; then
createISO "Install macOS Sierra.app" "Sierra"
else
if installerExists "Install OS X El Capitan.app" ; then
createISO "Install OS X El Capitan.app" "ElCapitan"
else
if installerExists "Install OS X Yosemite.app" ; then
createISO "Install OS X Yosemite.app" "Yosemite"
else
echo "Could not find installer for Yosemite (10.10), El Capitan (10.11), Sierra (10.12), High Sierra (10.13) or Mojave (10.14)."
fi
fi
fi
fi
fi