We convert the freshly created macOS Installer disk image file to a CDR file that will appear on the desktop: hdiutil convert /tmp/MacBigSur.dmg -format UDTO -o ~/Desktop/MacBigSur.cdr 6-Finally, we change the file extension from. 3-After CMD Line commands continuedġ-First, we must create a temporary disk image: hdiutil create -o /tmp/MacBigSur -size 14000m -volname MacBigSur -layout SPUD -fs HFS JĢ- Next, mount the disk image: hdiutil attach /tmp/MacBigSur.dmg -noverify -mountpoint /Volumes/MacBigSurģ-Now we’ll use the createinstallmedia utility that is part of the MacOS Installer application to copy the installer files to the disk image you just created: sudo /Applications/Install\ macOS\ Big\ Sur.app/Contents/Resources/createinstallmedia -volume /Volumes/MacBigSur -nointeraction 4-Unmount/Detach the disk image volume When finished, we then unmount/detach the disk image volume :ĭetach from Disk Utility 5-After unmount/detached the disk image volume continue in the Terminal : In your Applications you must have a “Install macOS Big Sur.app” # 11.4 is the most recent stable version as of this writing 2-Followed this: 1-Followed this: softwareupdate -fetch-full-installer -full-installer-version 11.4
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