As far requirements go, having a USB flash drive and the beta version of macOS Mojave are all the tis necessary, though having some degree of patience will be helpful because it can take a while to successfully create the boot installer.
Remember, this is going to erase the USB flash drive and turn it into a bootable installer for Mac OS 10.14. Do not use a USB flash drive that you don’t want erased.
Connect the USB flash drive to the Mac, then rename the USB drive to “MojaveBootInstall”. You can pick a different name just be sure to edit the command to reflect that.
Open “Terminal”, found within /Applications/Utilities/
sudo /Applications/Install\ macOS\ Mojave.app/Contents/Resources/createinstallmedia \ --volume /Volumes/MojaveBootInstall \ --applicationpath /Applications/Install\ macOS\ Mojave.app \ --nointeraction && echo Done
Double-check to confirm the syntax is accurate, and remember the USB drive is going to be erased in this process, then hit the Return key to start creating the macOS Mojave USB installer media.
Enter the admin password into the terminal if requested.
Let the process run it’s course, this will take a while depending on the speed of the target flash volume. When you see “Done” on screen, the task is complete and you can quit Terminal.
Once the macOS Mojave installer has been completed, the USB flash drive will be named as “Install macOS Mojave” and it’s ready to be used. If you open the volume you’ll see the typical Mojave installer app.
Now that you have created the boot installer for Mac OS 10.14, you can boot from any compatible Mac with it by doing the following:
Once booted up from the installer drive, you can either install macOS Mojave directly as an update, or have access to the traditional utilities menu options including Disk Utility. 06/06/2018