IT notes

macOs sparseimage

To create an install disk using an spare disk: $ hdiutil create -size 6GB -fs JHFS+ -volname "macOS_installmedia" -type SPARSE ~/Desktop/macOS_installmedia Mount it (or double-click in Finder to mount): $ hdiutil mount ~/Desktop/macOS_installmedia.sparseimage Use the createinstallmedia: $ sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia --volume /Volumes/macOS_installmedia --applicationpath /Applications/Install\ macOS\ High\ Sierra.app