Make sure the installer is fully downloaded (about 5 GB)

Good internet connection: You need to download the macOS High Sierra installer from the App Store.

Blank USB drive: You need a flash drive that has at least 16 GB of available storage space to create a bootable macOS High Sierra installer.Requirements to create a macOS High Sierra bootable USB driveĬreating a bootable drive with a High Sierra installer is quite simple.

Installing macOS the clean way (using a non-startup drive).Creating a bootable USB using the Terminal.Requirements to create macOS High Sierra bootable USB drive.It’s not hard at all, and in this article, we will guide you through: It makes sense to create a bootable USB flash drive to install the High Sierra operating system if you want to quickly install it on several Macs without having to download the installer each time.

The app will help you delete junk, duplicates, and unnecessary apps in a couple of clicks. MacKeeper allows you to free up necessary gigabytes easily. Please note that before installing any system, you need to ensure there is sufficient space on your Mac.

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