How to do a clean install of macOS High Sierra
(iMore iPhone)

Feel like you need a fresh start with macOS High Sierra? Do a clean install! Downloading and installing a new OS gives you the opportunity to do some major house cleaning if you so desire. If you feel like you`d like a fresh start with macOS High Sierra, you can always opt to do a clean install: Just follow the steps below, even if you`ve already installed macOS High Sierra. Make sure you understand the difference between a clean install and a standard install before you get started. Step 1: Back up your Mac Step 2: Create a bootable drive of macOS High Sierra Step 3: Erase your current Mac operating system Step 4: Install a new copy of macOS High Sierra Note: If you are reading this article on the Mac you want to perform the clean install with, switch to another device or print this page before continuing so you can read along as you go. Step 1: Back up your Mac This process will erase whichever OS you`re currently using from your hard drive entirely. That means any files, prog...