Hdiutil attach -noverify -nobrowse -mountpoint /Volumes/isoĪsr restore -source /Volumes/esd/BaseSystem.dmg -target /Volumes/iso -noprompt -noverify -erase Hdiutil create -o ElCapitan3.cdr -size 7316m -layout SPUD -fs HFS+J hdiutil attach '/Applications/Install OS X El Capitan.app/Contents/SharedSupport/InstallESD.dmg' -noverify -nobrowse -mountpoint /Volumes/esd The instructions below, found on, worked for me after a download of El Capitan from the App Store.
