Create a bootable ISO from the OS X Mavericks app

better-mavericks-iso.sh

#!/bin/sh

# Better Mavericks ISO
# Tool that generates mavericks iso file
#
# Improved version of https://gist.github.com/MXP2095onetechguy/cfe9c91f15a59932a0774af84eb0777c
# MXPSQL wrote this fork on the last day of 2021
# Use temp to do it
# Create a bootable ISO from the OS X Mavericks app
# http://thezinx.com/misc/trend/create-bootable-dmg-iso-mavericks-app/

# Hi
echo "Better Mavericks ISO Generator"

# Init arguments
APPLoc="./Mavericks.app/Contents/SharedSupport/InstallESD.dmg" #

TmpVolume=/Volumes/`tr -dc A-Za-z0-9 </dev/urandom | head -c 13 ; echo ''`_install_app # volume mount location
TmpBuild=/Volumes/`tr -dc A-Za-z0-9 </dev/urandom | head -c 13 ; echo ''`_install_build # sparse bundle package adition location

TmpSIMg_NOEXT=`mktemp -u` # sparse image location

TmpCdr_NOEXT=`mktemp -u` # cdr image location

FinalISO=`echo ~/Desktop/Mavericks.iso` # location of the final build


# Parse args
for i in "$@"; do
    case $i in
        --TempBuild=*)
            TmpBuild="${i#*=}"
            shift
            ;;
        --TempVol=*)
            TmpVolume="${i#*=}"
            shift
            ;;
        
        --TempSparseImage=*)
            TmpSImg_NOEXT="${i#*=}"
            shift
            ;;
        --TempCDR=*)
            TmpCdr_NOEXT="${i#*=}"
            shift
            ;;
        
        -o=*|--output=*|--final-build=*)
            FinalISO="${i#*=}"
            shift
            ;;

        -h|--help)
            echo "Open this script and take a look at the variables"
            exit 0;
            ;;

        -*|--*)
            ;;
        *)
            ;;
    esac
done

# Initialize other variables, examples are dependent variables
TmpSImg=`echo $TmpSImg_NOEXT`.sparseimage # $TmpSImg_NOEXT, but with file extension
TmpCdr=`echo $TmpCdr_NOEXT`.cdr # $TmpCdr_NOEXT, but with file extension



# Mavericks app check
if [ ! -f /Applications/Install\ OS\ X\ `echo $APPLoc` ]; 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\ `echo $APPLoc` -noverify -nobrowse -mountpoint $TmpVolume

# Convert the boot image to a sparse bundle
hdiutil convert $TmpVolume/BaseSystem.dmg -format UDSP -o $TmpSImg_NOEXT

# Increase the sparse bundle capacity to accommodate the packages
hdiutil resize -size 8g $TmpSimg

# Mount the sparse bundle for package addition
hdiutil attach $TmpSimg -noverify -nobrowse -mountpoint $TmpBuild

# Remove Package link and replace with actual files
rm -v $TmpBuild/System/Installation/Packages
cp -rpv $TmpVolume/Packages $TmpBuild/System/Installation/

# Unmount the installer image
hdiutil detach $TmpVolume

# Unmount the sparse bundle
hdiutil detach $TmpBuild

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

# Convert the sparse bundle to ISO/CD master
hdiutil convert $TmpSimg -format UDTO -o $TmpCdr_NOEXT

# Remove the sparse bundle
rm $TmpSimg

# Rename the ISO and move it to the desktop
mv -v $TmpCdr $FinalISO