Mac Os High Sierra Iso Google Drive Apr 2026

# 1. Create a blank disk image (8 GB minimum) hdiutil create -o HighSierra -size 8g -layout SPUD -fs JHFS+ hdiutil attach HighSierra.dmg -noverify -mountpoint /Volumes/install_build 3. Write the installer to the mounted image sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build --nointeraction 4. Unmount the image hdiutil detach /Volumes/Install\ macOS\ High\ Sierra 5. Convert the image to ISO/CDR format hdiutil convert HighSierra.dmg -format UDTO -o HighSierra.iso 6. Rename to .iso mv HighSierra.iso.cdr HighSierra.iso