For this reason, you need an external HD that is at least the same size as your Mac’s internal memory External hard drive (optional): You need to back up your data to save your important files before installing the new macOS.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.
HOW TO CREATE MAC OS USB BOOTABLE DRIVE INSTALL
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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