My personal laptop is a Chromebook. I've been using it for 5 years. I throw it in my backpack and rarely turn it off. It has terrific battery life and does most of what I need it to. But it's begun to show its age. First the internal mic went out. OK, I could plug in my phone's headphones. Then the camera went out. OK, I could buy a camera--but this starts to look like a trend. I realized I might need to have a backup computer, so dug up my 2011 MacBook Pro. It was running elementary OS 5.1, Hera, based on Ubuntu. (See my earlier post on this combo.) elementary is a good match for a Mac. Its use of the Pantheon desktop environment gives it a sleek, light, colorful look. But Hera has been superseded, meaning it no longer has security updates. I didn't want to mess around on the internet with a vulnerable machine. And unlike some operating systems, upgrading meant more than issuing some commands. I would have to reinstall it. So I downloaded the latest elementary--versi...