How to Create a MacOS Installer on a USB Stick

If you want to download the latest version of macOS, just head over to the Mac App Store and download it. But what if you’re an IT geek working in a computer repair shop, refurbishing a Mac that requires a MacOS reinstall? What if the Internet connection in your place is unusable, in the simplest terms?

Then, accessing the App Store to reinstall macOS will be quite difficult and takes a lot of time. You’ll find it much easier and quicker to reinstall macOS if you already have the program on your USB stick.

Put the latest and greatest MacOS on a USB stick

I should have tried to get away from the problem first before going into the pro section. While creating a macOS installer is certainly a great time saver if you have multiple Macs to work with, there To be a drawback.

Since the operating system is constantly being updated to keep it up to date with security issues, whatever version of the operating system you end up on a USB stick is bound to soon become invalid. So you will have to keep up to date with security updates on a regular basis and make sure that you also keep the operating system version up to date on your device using the method that I am about to show.

Cartoon a USB with eyes

To do this, you will need access to a Mac computer and a good Internet connection, as well as a USB stick with at least 8GB on it. Make sure you have a backup of everything on the stick as the stick will be deleted when it is formatted by Disk Creator.

How to Create a MacOS Installer Using Disk Creator

At the time of writing, current macOS is Mojave. So the first thing you need to do is go to the Mac App Store on your Mac with an Internet connection and download the operating system.

This can be done simply by clicking the “Get” button.

MacOS Mojave in the App Store with the Get Designated Button

It will ask you if you are sure you want to download it (probably because you already have it). Click “Yes” (you may have to log in with your admin ID) then it will start.

Download macOS Mojave Pop-up

Depending on the speed of your Internet connection, it may take 5-10 minutes to download the entire file. When it’s done, you’ll find it in the Applications folder.

Install the macOS Mojave app in the Applications folder

Next, extract and open Disk Creator. No installation required. So you will see this right away.

Disk Creator installation window

First, choose what the installer will be. In this case, it is “USB” (obviously make sure the USB stick is empty in the computer first for it to show up in this menu).

Select USB from the drop-down menu in Disk Creator

Now click on “Select macOS installer”. This will open a window on your computer. Navigate to the Mojave file in the Applications folder and select it.

Install the macOS Mojave app in the Applications folder

Finally, click “Create Installer” and let it do its thing. You will be asked to log in with your admin password to grant permissions.

Create Installer warning window

It will take about 10 minutes for the USB stick to be properly formatted and the installer ready to go.

But when it’s done, you’ll see this little window telling you how to use it.

Complete the window in Disk Creator

Create a USB installer using the terminal

macOS Mojave installer window

Since Disk Creator is free and easy to use, there’s no reason not to use it. But some people are just a little finicky when it comes to software coming from third-party developers. If this is true for you, you can still create a USB installer using Terminal instead of Disk Creator.

Download Mojave as usual and plug in your empty USB stick and you’re good to go. Then, in Terminal, type the following:

sudo /Applications/Install\ macOS\ install macOS – volume /Volumes/Untitled –
applicationpath /Applications/Install\ macOS\ install macOS
--nointeraction &&say Done

Enter your password when prompted and wait for it to say “Done” in Terminal before you remove the USB drive. Interesting!

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