How to do a clean install of macOS using a bootable USB driveīefore you begin, you will need the following: You will now find two volumes to delete: Macintosh HD-Data and Macintosh HD.
This is something that we will see throughout the article as well.Ī word of warning, if you want to do a clean install of macOS Catalina and you’re already running Catalina, the process is different from previous versions of macOS. There is also an even easier method that allows you to use macOS Recovery to reinstall the Mac operating system from the web. The traditional way was to create a bootable copy of macOS installer on a Flash drive, then format your drive before installing the bootable copy on your Mac. What tools do i needīefore you begin, you should know that there are two ways to perform a clean install of macOS. In the following tutorial, we explain how to install macOS on your Mac by updating the operating system, but if you want to learn how to reinstall it from scratch, or download older versions of macOS X, you can also refer to this article. You can find here a full article on how to install macOS High Sierra on your Mac. We will start by showing step by step how to do this for the latest version of macOS Catalina (at the time of writing the article), before showing how to install a clean copy of a previous version such as High Sierra, Sierra, El Capitan, Mojave, Yosemite or an earlier version of OS X. This is also something that we generally resort to, believing that the computer may have a virus (although there is a lot of debate as to whether there are viruses and malware on the Mac that can cause it to malfunction. Without a doubt, this is a very useful option if your Mac has gotten slow or behaving strangely, crashes some apps, or slows down tasks. In this article, we explain how to perform a clean install of macOS.
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