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colinbendell/macOS Install Image

Created June 24, 2020 13:25
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macOS Install Image
cd ~/Downloads/
sudo hdiutil create -o InstallMedia -size 20G -layout SPUD -fs HFS+J -type SPARSE
sudo hdiutil attach InstallMedia.sparseimage -noverify -mountpoint /Volumes/install_build
sudo /Applications/Install\ macOS\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/install_build
sudo hdiutil detach -force /Volumes/Install\ macOS\ */
# ^^ Might fail; manually eject using finder.
sudo hdiutil convert InstallMedia.sparseimage -format UDZO -o InstallMedia.dmg
sudo rm InstallMedia.sparseimage
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