

Plug in the USB stick and launch Disk Utilities.The installer will remain in your Applications folder. As soon as it does, select File and Quit (or keyboard shortcut Command-Q)so it doesn’t install. When it’s finished, the installer will launch.Download macOS High Sierra from the App Store.And make sure you have a record of license codes for apps and passwords for websites. Signup to try Setappfor free.Īs well as backing up your Mac, you should also take screenshots of settings in any apps you’ve customized so that you can set them up again quickly later. With Setapp, you always have the latest full version of every app.

You don't need to dig through Internet to search and and download each apps mentioned below, all of them available on Setapp. Once you have everything that's needed, let's begin.Don’t worry, this step-by-step guide will walk you through all you need to do. How to clean install macOS on a startup drive If you don’t know which one you have, go with the first option, startup drive. It’s a more lenient and less intrusive way because your Mac doesn’t get wiped clean, only your system. If you have another drive or volume other than your startup drive, use the second way which is clean installing on a non-startup drive.

This way entails one important fact: all your files and data will be deleted during the process. If you only have one drive and it’s not partitioned and this is where you have all your files and your OS, your choice is to clean install on the startup drive.
