![]() We don’t want to upgrade your friend’s Mac we just need the downloaded files. Note that, after doing this, the name of our destination mount point has changed to “OS X Base System/System.” You’re almost done! Unmount the image: hdiutil detach /Volumes/OS X Base SystemĪnd, finally, convert the image you created into an ISO file: hdiutil convert /tmp/ -format UDTO -o /tmp/HighSierra.iso Now you’re going to restore BaseSystem.dmg from the installer over to the newly mounted image: asr restore -source /Applications/Install macOS High Sierra.app/Contents/SharedSupport/BaseSystem.dmg -target /Volumes/install_build -noprompt -noverify -erase Next, mount your blank image: hdiutil attach /tmp/ -noverify -nobrowse -mountpoint /Volumes/install_build To convert those files to an ISO, we’ll need to use the Terminal, which you can find in Applications > Utilities.įirst, run the following command to create a blank disk image: hdiutil create -o /tmp/HighSierra.cdr -size 7316m -layout SPUD -fs HFSJ #Mac os high sierra virtualbox image upgrade# ![]() Move the ISO to the desktop: mv /tmp/ ~/Desktop/HighSierra.isoĪnd you’ve got a bootable High Sierra ISO file!Ĭopy it to your Windows machine using a large flash drive, an external hard drive, or over your local network. Next, head to your Windows machine, and install VirtualBox if you haven’t already, making sure you have the latest version (seriously, older versions may not work.) Step Two: Create Your Virtual Machine in VirtualBox #Mac os high sierra virtualbox image software#. ![]()
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