Sudo rm -rf '/Volumes/OS X Base System/Install macOS High Sierra.app'Ĭaffeinate sudo cp -a '/Applications/Install macOS High Sierra.app' '/Volumes/OS X Base System/'Ĭp '/Applications/Install macOS High Sierra.app/Contents/Resources/InstallAssistant.icns' '/Volumes/OS X Base System/.VolumeIcon.icns' To reflect the setting in the source image.Ĭopying must be done as the superuser since it contains locked files that the normal user does not This will change the name of the volume from Untitled to OS X Base System,

Now create a bootable image from the mini-system that is embedded in the installer.Ĭaffeinate asr restore -source '/Applications/Install macOS High Sierra.app/Contents/SharedSupport/BaseSystem.dmg' -target /Volumes/Untitled -noprompt -noverify -erase Hdiutil attach /tmp/HighSierra.sparseimage -noverify -nobrowse -mountpoint /Volumes/Untitled

Hdiutil create -o /tmp/HighSierra -size 12800m -layout SPUD -fs HFS+J -type SPARSE Please make sure that you don't have any other disks named Untitled Mv '/macOS Install Data' '/Applications/Install macOS High Sierra.app/Contents/SharedSupport'Ĭreate an image file with sufficient space to hold the DVD, in a format that is writable and You should move the entire top directory instead ofĬopying the files underneath it, because there are locked files which you ordinary user cannot access. The files back into the required subdirectory. Within the installer directory, to be copied from there.

To create a bootable installer, these files must be available from The bulk of the downloaded files is put directly in an auxiliary directory in the root of the volume Rather select Quit from the application menu at the top of the screen. When you get to the final screen, do NOT click the Reset button, but Then you must run the program, accept the license and pick a target volume. Which systems that receive the full installation package and which only get the stub. On some systems, only a small stub of about 19MB is downloaded. This will create a directory called 'Install macOS High Sierra' Instructions here require that you use the Terminal to enter commands. ThisĪrticle will show how to do this with the High Sierra version of macOS. However, you may find that CDsĪre easier to store as backups, and thus want to create an old-fashioned CD installer. Creating a macOS High Sierra Installation ISO Image Creating a macOS High Sierra Installation ISO Imageįor the last couple of macOS versions, it has been standard to upgrade the system from aĭownloaded package, or to create an installation USB drive.

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