To continue we need to erase the volume at /Volumes/install_build. Sudo /Applications/Install\ macOS\ Mojave\ Beta.app/Contents/Resources/createinstallmedia –volume /Volumes/install_build I also got this error when creating the ISO file on step 3: ending with “Press ESC in 0 seconds to skip startup.nsh or any other key to continue. I use the Mojave.iso as the boot file, and I get this screen: “UEFI interactive shell” etc.
The resulting ISO can be used to create bootable USBs, DVDs, install VMs, or simply to archive for your backups “just in case”.īut I am trying to use the ISO file I created to launch a virtual machine (10.13 Host, 10.14 guest). The resulting file on my desktop is almost ready to use. Here are some of my outputs for you to review (after the first three commands) Hdiutil convert ~/Desktop/InstallSystem.dmg -format UDTO -o ~/Desktop/HighSierra.iso Hdiutil detach /Volumes/Install\ macOS\ High\ Sierra Sudo /Applications/Install\ macOS\ High\ Sierra.app/Contents/Resources/createinstallmedia -volume /Volumes/install_build Hdiutil attach /tmp/ -noverify -mountpoint /Volumes/install_build Run these commands one at a time ( Update :: I changed the 5130m to 5200m based on feedback from the comments) hdiutil create -o /tmp/HighSierra.cdr -size 5200m -layout SPUD -fs HFS+J Overview of how to create a bootable macOS 10.13 High Sierra ISO image:Ĭlick this link to open the macOS High Sierra download in the App StoreĮspecially if you’ve already upgraded to high sierra and deleted the installer data (with CleanMyMac etc) you will need to download this again before proceeding with this article. This means you actually need a Mac or a MacBook to create this bootable ISO. To abide with Apple’s terms of use, you must go through official channels to obtain the macOS installer. This guide will also be useful for those who can run Virtual Machines of macOS in environments like VirtualBox etc. As an owner of a MacBook Pro, it’s slightly unsettling that I wouldn’t necessarily be able to plug in a bootable USB or insert a DVD with the macOS installer image in the event that I needed to re-install my OS because my SSD ate the dust, or something. OS X was a different story, but also you had to pay for those versions.
Normally you can’t obtain bootable media of macOS.
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