How to Download and Create a Bootable macOS High Sierra Installer

Are you eager to get your hands on the latest operating system from Apple? Look no further! In this tutorial, we'll show you how to download and create a bootable macOS High Sierra installer for your Mac.

To start, make sure you have a compatible Mac that supports High Sierra. Once you've confirmed compatibility, follow these steps:

Step 1: Download macOS High Sierra from the Mac App Store.

Step 2: Once the download is complete, close the installer that appears using Command (⌘)+Q.

Step 3: Open Finder → Applications and right-click on Install macOS High Sierra Beta and select Show Package Contents.

Step 4: Drag the contents of the package to a location on your Mac. We'll need this later in the process.

Step 5: Open a Terminal window via Applications → Utilities → Terminal.

Step 6: Type `sudo` followed by a space.

Step 7: Drag `createinstallmedia` into the Terminal window from the Finder location opened in Step 4.

Step 8: Type `-volume` followed by a space.

Step 9: Connect your USB drive to your Mac.

Step 10: Drag the USB flash drive volume into the Terminal window.

Step 11: Type `-applicationpath` in the Terminal window followed by a space.

Step 12: Open Finder → Applications and drag Install macOS High Sierra Beta into the Terminal window.

Step 13: Press Return on the keyboard to submit the full command.

Step 14: Type `Y` to continue when prompted, and press Return on the keyboard.

Step 15: The install process will commence by erasing the contents of your USB drive and copying the installer files to the drive. This entire process can take around 20-30 minutes, so be patient as the install process completes.

Once the process is finished, you'll have a working macOS High Sierra bootable USB install disk that can be used to install macOS High Sierra beta on any Mac that supports it. Remember to back up your important data before proceeding, as this tutorial will purge everything on the drive.

Not only will this walkthrough work for the macOS High Sierra beta, but it will also work for the final public release once available. If you want the ability to perform a fresh and clean install of macOS High Sierra, then creating a bootable macOS High Sierra USB install drive is the way to go.

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