MacBook Air used to be the computer you would never think was possible: thin enough to fit in an envelope, but powerful enough to run all the programs you love. For years, the Air collected dust as other notebooks came out more powerful and almost the same weight. In 2018, however, it was made relevant again when Apple released a new model that was both powerful and had a Retina display. If you have purchased the notebook or are just curious about seeing more about what Mac OS Catalina (10.15) can do for you, then you'll see it in this book. If you are switching from Windows to Mac, then I'll walk you through the steps to make it as quick