eddieh/macos-appstore-installer-to-iso.org

Created November 29, 2021 07:42

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Convert macOS App Store Installer to a Bootable ISO

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Convert macOS App Store Installer to a Bootable ISO

IMG=Catalina
APPRES="/Applications/Install macOS Catalina.app/Contents/Resources"

hdiutil create -volname $IMG -size 12g -layout SPUD -fs HFS+J -attach -ov ~/$IMG.dmg

sudo "$APPRES"/createinstallmedia --nointeraction --volume /Volumes/$IMG

hdiutil detach "/Volumes/Install macOS Catalina"

hdiutil convert ~/$IMG.dmg -format UDTO -o ~/$IMG.iso

mv ~/$IMG.iso.cdr ~/$IMG.iso

rm ~/$IMG.dmg