IDG Contributor Network: macOS Sierra: How to do a clean install

macOS Sierra has finally been released, and Mac users around the world are getting ready to install it on their computers. But the eternal question looms once again: Should you do a clean install or just do an upgrade on your Mac?My advice is to do a clean install if it’s been a long time since you did one. Over time, as you do one upgrade after another of macOS, you might find that your Mac’s performance slips and that it slows down considerably. A clean install can help fix that an