MacVoices #21074: Glenn Fleishman Takes Control of Your M-Series Macs, Securing Your Mac, More (1) Glenn Fleishman has been very busy with his Take Control titles, and we were able to get him to take a break just long enough to talk about his newest books and updates. In the first of a multi-part discussion, we dig in to Take Control of Your M-Series Mac. The new Apple M1 Macs represent some major changes in features, many of them driven by security. Glenn helps us find out what we need to re-learn. (Part 1)