While it is quite easy to download and install macOS Mojave from the Mac App Store. Sometimes, advanced users need to keep a backup bootable USB installer for diagnostic purposes or to install the operating system on other Macs, without downloading it again. Not only does it save time, it also saves bandwidth, specially for those with metered Internet connections. Here the best methods for creating a bootable USB installer for macOS Mojave.
Create macOS Mojave bootable USB installer
Before you follow any of the below methods, make sure that you have:
- Registered as a developer or public beta tester, so you are eligible to download macOS Mojave from the Mac App Store. This will ensure that you have the required source installer to follow the next steps.
- A USB drive which is at least 8GB in size and is formatted. You can format it by plugging it into your Mac and use Disk Utility.
Once you have downloaded macOS Mojave from the Mac App Store, its installer will show up. Quit this installer so that you do not upgrade just yet, while at the same, you have the source file downloaded to your Mac.
- Plugin the USB drive to your Mac
- Open Terminal
- Enter this command:
sudo /Applications/Install\ macOS\ Mojave\ Beta.app/Contents/Resources/createinstallmedia --volume /Volumes/Mojave -- /Applications/Install\ macOS\ Mojave\ Beta.appAs this command uses sudo, you will have to enter your Mac password to continue.
- This command looks for the macOS Mojave installer that you downloaded from Mac App Store, and uses it to create a bootable drive
The process might take a while, depending on your USB drive speed. Once the process completes, the drive can be used to install Mojave to any Mac.
Using DiskMaker X or Disk Creator
There are a number of apps that can be used to create a bootable installer for Mojave. DiskMaker X and Disk Creator are the most popular and reliable apps for this purpose. During the best testing phase of mac OS Mojave, only Disk Creator has been updated to support it.
Using these apps is very easy:
- Similar to the Terminal command method, make sure that you have downloaded macOS Mojave from Mac App Store.
- Plugin your USB and ensure that it is formatted.
- Open Disk Creator and point it to your Mojave installer file. If you downloaded from the App Store, these apps will be able to find the installers automatically.
- Click Create Installer and let the process complete.
Once done, your bootable USB drive will be ready to use.
Restart Mac using bootable USB installer
Once you have create a USB installer by using any of these methods, restart your Mac and hold down the Option key when the display turns on. You will see the Startup Manager which will show your newly created bootable drive as a device to boot from. Use the arrow keys to select it and hit return to boot from it and start the installation process.
Download DiskMaker X
Download Disk Creator