Your next big Mac update is here. How to download and install MacOS Catalina

Apple's been busy, rolling out the new iPhone 11 and 11 Pro, iPads, its new Apple Arcade gaming service, Apple Watch Series 5 smartwatches and Apple TV Plus. And now, not missing a step, it's released Catalina, the latest version of the MacOS. Read our in-depth review of MacOS Catalina before you …