What you’ll need
# Create a DMG from the installer folder hdiutil create -o /tmp/Sierra -srcfolder /Applications/Install\ macOS\ Sierra.app download macos sierra 1012 dmg file install
If you need to run legacy software, revive an older Mac, or simply prefer the classic interface of macOS Sierra (10.12), finding a legitimate copy can be tricky. Apple no longer lists Sierra prominently in the App Store’s "Purchased" tab for newer Apple IDs. What you’ll need # Create a DMG from