Create macOS ISO Files for Installation 💿

This guide outlines the steps to create ISO files for various macOS versions.

Sequoia.iso 🌲

hdiutil create -o /tmp/Sequoia -size 16710m -volname Sequoia -layout SPUD -fs HFS+J
hdiutil attach /tmp/Sequoia.dmg -noverify -mountpoint /Volumes/Sequoia
sudo /Applications/Install\ macOS\ Sequoia.app/Contents/Resources/createinstallmedia --volume /Volumes/Sequoia --nointeraction
hdiutil eject -force /Volumes/Install\ macOS\ Sequoia
hdiutil convert /tmp/Sequoia.dmg -format UDTO -o ~/Desktop/Sequoia
mv -v ~/Desktop/Sequoia.cdr ~/Desktop/Sequoia.iso
rm -fv /tmp/Sequoia.dmg

Sonoma.iso 🍷

hdiutil create -o /tmp/Sonoma -size 16384m -volname Sonoma -layout SPUD -fs HFS+J
hdiutil attach /tmp/Sonoma.dmg -noverify -mountpoint /Volumes/Sonoma
sudo /Applications/Install\ macOS\ Sonoma.app/Contents/Resources/createinstallmedia --volume /Volumes/Sonoma --nointeraction
hdiutil eject -force /Volumes/Install\ macOS\ Sonoma
hdiutil convert /tmp/Sonoma.dmg -format UDTO -o ~/Desktop/Sonoma
mv -v ~/Desktop/Sonoma.cdr ~/Desktop/Sonoma.iso
rm -fv /tmp/Sonoma.dmg

Ventura.iso 🌅

hdiutil create -o /tmp/Ventura -size 14384m -volname Ventura -layout SPUD -fs HFS+J
hdiutil attach /tmp/Ventura.dmg -noverify -mountpoint /Volumes/Ventura
sudo /Applications/Install\ macOS\ Ventura.app/Contents/Resources/createinstallmedia --volume /Volumes/Ventura --nointeraction
hdiutil eject -force /Volumes/Install\ macOS\ Ventura
hdiutil convert /tmp/Ventura.dmg -format UDTO -o ~/Desktop/Ventura
mv -v ~/Desktop/Ventura.cdr ~/Desktop/Ventura.iso
rm -fv /tmp/Ventura.dmg

Monterey.iso 🏔️

hdiutil create -o /tmp/Monterey -size 16384m -volname Monterey -layout SPUD -fs HFS+J
hdiutil attach /tmp/Monterey.dmg -noverify -mountpoint /Volumes/Monterey
sudo /Applications/Install\ macOS\ Monterey.app/Contents/Resources/createinstallmedia --volume /Volumes/Monterey --nointeraction
hdiutil eject -force /Volumes/Install\ macOS\ Monterey
hdiutil convert /tmp/Monterey.dmg -format UDTO -o ~/Desktop/Monterey
mv -v ~/Desktop/Monterey.cdr ~/Desktop/Monterey.iso
rm -fv /tmp/Monterey.dmg

BigSur.iso 🌉

hdiutil create -o /tmp/BigSur -size 13500m -volname BigSur -layout SPUD -fs HFS+J
hdiutil attach /tmp/BigSur.dmg -noverify -mountpoint /Volumes/BigSur
sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia --volume /Volumes/BigSur --nointeraction
hdiutil eject -force /Volumes/Install\ macOS\ Big\ Sur
hdiutil convert /tmp/BigSur.dmg -format UDTO -o ~/Desktop/BigSur
mv -v ~/Desktop/BigSur.cdr ~/Desktop/BigSur.iso
rm -fv /tmp/BigSur.dmg

Catalina.iso 🐾

# Create a DMG Disk Image:
hdiutil create -o /tmp/Catalina -size 8500m -volname Catalina -layout SPUD -fs HFS+J

# Mount it to your macOS:
hdiutil attach /tmp/Catalina.dmg -noverify -mountpoint /Volumes/Catalina

# Create macOS Catalina Installer:
sudo /Applications/Install\ macOS\ Catalina.app/Contents/Resources/createinstallmedia --volume /Volumes/Catalina --nointeraction

# Unmount Catalina Disk:
hdiutil eject -force /Volumes/Install\ macOS\ Catalina

# Convert the DMG file to an ISO file:
hdiutil convert /tmp/Catalina.dmg -format UDTO -o ~/Desktop/Catalina.cdr

# Rename and Move to Desktop:
mv ~/Desktop/Catalina.cdr ~/Desktop/Catalina.iso

# Clean Temp File:
rm -fv /tmp/Catalina.dmg

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devomman/Create_macOS_ISO_Files.md