How to Create a Bootable USB Installer for macOS High Sierra

The size of the macOS installer has become increasingly larger, with the Monterey installer weighing in at 12GB and the Big Sur installer clocking in at 13GB. While it is theoretically possible to use an external hard drive as a bootable macOS installer, a USB flash drive is always recommended due to its quicker boot times compared to standard hard drives.

To create a bootable USB installer for macOS High Sierra, you will need a clean flash drive with at least 15GB of available space and a bootable Mac. Creating a bootable macOS installer can be particularly useful when troubleshooting a malfunctioned Mac or in situations where your MacBook Pro won't boot from its internal hard drive.

Mac, known for delivering excellent performance and user-friendliness, is not immune to the occasional glitch. If your MacBook won't turn on or you're experiencing other issues, having a bootable macOS installer can help bring your machine back online quickly.

When Do You Need a Bootable macOS Installer?

There are several situations in which creating a bootable macOS installer can be helpful:

* When your MacBook Pro won't boot from its internal hard drive

* If you need to troubleshoot a malfunctioned Mac

* If you want to install macOS on multiple computers without having to download the installer each time

Fortunately, creating a bootable macOS installer is a relatively straightforward process. You can use the Rufus for Mac tool to help guide you through the process.

Essential Preparations Before Creating a Bootable Installer

Before you begin, make sure you have:

* A clean flash drive with at least 15GB of available space

* A bootable Mac

* The macOS High Sierra installer (you can download it from the App Store or create one using the built-in 'Install macOS' app)

With these preparations out of the way, creating a bootable macOS installer is just a few clicks away. Follow our step-by-step guide to learn how to create a bootable USB installer for macOS High Sierra and get your Mac up and running in no time.

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