Hdiutil attach macOS_Sierra_10.12.0.cdr.dmg -noverify -nobrowse -mountpoint /Volumes/isoĪsr restore -source /Volumes/esd/BaseSystem.dmg -target /Volumes/iso -noprompt -noverify -erase Hdiutil create -o macOS_Sierra_10.12.0.cdr -size 6144m -layout SPUD -fs HFS+J Hdiutil attach '/Applications/Install macOS Sierra.app/Contents/SharedSupport/InstallESD.dmg' -noverify -nobrowse -mountpoint /Volumes/esd Copy and paste the code below into the document, modifying the path to the InstallESD.dmg if necessary, then save and close.īack in Terminal: chmod u+x makeSierraISO.Note: This requires 12 GB of free space to create but only uses 6 GB when finished. To create an ISO Image from the 'Install macOS Sierra.app' application bundle, I used the following bash script. The ISO Image should also work in Parallels Desktop. I'm use VMware Fusion and just downloaded 'Install macOS Sierra.app' from the App Store and then made an ISO Image to install from.