hdiutil detach /Volumes/Install\ macOS\ High\ Sierra hdiutil convert /tmp/HighSierra.dmg -format UDTO -o ~/Desktop/HighSierra.iso

hdiutil create -o /tmp/HighSierra -size 8500m -volname HighSierra -layout SPUD -fs HFS+J

git clone https://github.com/corpnewt/gibMacOS cd gibMacOS python3 gibMacOS.py Choose the catalog (e.g., PublicRelease ) and select High Sierra 10.13.6.

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