You just copy a probably defunct and thus non-bootable base macOS system to the image. Your final HighSierra.iso is missing the complete InstallESD content (AKA the real High Sierra installer). Is there something else I need to do in order to create my virtual macOS instance? However, when I attempt to boot from the ISO to start the install process, I'm met with a blank, black screen. I've also created my VirtualBox guest on VirtualBox 5.2.0 r118431 with 8GB RAM and 2 processors. Hdiutil convert /tmp/ -format UDTO -o /tmp/HighSierra.iso Hdiutil detach /Volumes/OS\ X\ Base\ System Hdiutil attach /tmp/ -noverify -nobrowse -mountpoint /Volumes/install_buildĪsr restore -source /Applications/Install\ macOS\ High\ Sierra.app/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase I've created an ISO of High Sierra by downloading the installer from the Mac AppStore and running the following commands: hdiutil create -o /tmp/HighSierra.cdr -size 7316m -layout SPUD -fs HFS+J without rendering my primary laptop unusable. I would like to install a VirtualBox guest of macOS High Sierra on my MacBook Pro that is also running macOS High Sierra so that I can experiment with MDMs, etc.
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