3. Clean install of High Sierra

Some users prefer to do a ‘clean’ installation of a new OS by copying the necessary files to a USB stick, booting from it, then overwriting the existing OS.

To do this you must have access to a Mac running at least OS X 10.8 and be signed in to the App Store with your own Apple ID. Make sure to back up your current data before proceeding (see ‘Back up your files’ below).

Once you have prepared the installation USB you can perform the clean install at any time. After booting the disk visit bit.ly/setup_ assistant for help with Setup Assistant. Here are three tips to follow…