How to Install macOS High Sierra from a USB Drive

In this article, we will guide you through the process of installing macOS High Sierra from a USB drive. This is a crucial step if you want to install or upgrade your Mac's operating system. We will cover two methods: creating a bootable macOS High Sierra USB on both Windows PC and Mac.

Preparation: Downloading the Installation Image

Before we begin, it's essential to download the installation image of macOS High Sierra. You can obtain this from Apple's official website or other reliable sources. The installation app for macOS High Sierra is not available on the Mac App Store, so you'll need to download a DMG file.

Method 1: Creating a Bootable macOS High Sierra USB on Windows PC

To create a bootable macOS High Sierra USB on a Windows PC, you'll need to use a third-party software called UUByte DMG Editor. This powerful and easy-to-use tool allows you to burn the dmg file to your USB drive, making it a bootable device for OS installation.

Here's how to do it:

1. Download and install UUbyte DMG Editor on your Windows 10 PC.

2. Connect a USB drive to your PC and make sure the drive letter appears in Windows Explorer.

3. Download the macOS High Sierra DMG file from a reliable source.

4. Open UUByte DMG Editor and select 'Burn dmg to USB' option.

5. Choose the USB drive as the target device and click 'Start Burning'.

6. Wait for the process to complete, which may take a few minutes.

Method 2: Creating a Bootable macOS High Sierra USB on Mac

Creating a bootable macOS High Sierra USB on a Mac is much simpler. You can use Apple's built-in utility, `reatinstallmedia`, or third-party apps like DMG Editor.

Here's how to do it:

1. Unpack the High Sierra dmg file you downloaded earlier and move the 'Install macOS High Sierra' app to your Application folder.

2. Open Terminal on your Mac and navigate to the Applications folder using the command `cd Applications`.

3. Use the following command to create a bootable USB drive: `reatinstallmedia --install macOS High Sierra.iso /Volumes/YourUSBDriveName`.

4. Follow the prompts to complete the installation process.

In conclusion, creating a bootable macOS High Sierra USB is a straightforward process that can be done on both Windows and Mac. By following these steps, you'll have a bootable USB drive ready for OS installation. Remember to download the correct DMG file and follow the instructions carefully to avoid any issues during the installation process.

Install mac os sierra from usb