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The key things to be careful about are the creation of the bootable USB, formatting it properly and booting your computer from the media instead of from the regular installation files.

If youre willing to follow the prescribed steps, you can do it even without having the expertise of a systems administrator.

What makes it confusing is that there are usually several ways to clean install, re-install or upgrade macOS.

Each type of installation requires a slightly different approach.

In this article, well outline one of the simplest ways to clean install macOS Mojave from a USB flash drive.

Read each one carefully and make sure you understand what to do.

Its somewhat similar in function to ISO for Windows environments, but there are many differences as well.

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The one thing they can both do is to be burned as bootable media so an OS can be installed from a portable storage medium like a pen drive.

Make sure that once you download the file, it doesnt automatically start the installation.

You need the installation files, which will be deleted if the OS is installed.

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You will need a disk authoring software that can write the DMG file with all relevant boot information to make it bootable.

If you cannot boot from the drive you create in this step, you cant proceed with the installation.

You can use the third-party apps to burn DMG to USB and follow the steps shown below.

To do this, go to your USB drive within Disk Utility and click on the button or tab that says Erase.

Now fill out Name, Format and Scheme fields, click Erase and Done.

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The format should be set to Mac OS Extended (journaled) and the scheme, if required, should be GUID Partition Map.

The next step is to boot your Mac from this installer, and theres a special way to do that.

Restart the Mac, but when you hear the startup chime, hold down the Option (alt) key on your Mac until you see the Startup Manager.

Several drives will be displayed, but only the ones that have bootable media installed.

Pick your USB drive using a double-click with the mouse pointer or by using the arrow keys and Return (enter) on a keyboard.

Just choose a language when prompted, and follow the instructions shown on screen as macOS Mojave is installed.

You will need to first choose the right OS version and select Reinstall a New Copy of macOS.

Click on Continue, and then on Continue again when the installer opens, and click Install to complete the process.

You dont require any experience and you dont need any additional tools.

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