Tutor for Screenshots for the Mac Have you ever wanted to take a screenshot on your Mac running macOS High Sierra or an older operating system? Not sure how? In this tutorial I’ll show you how you can take screenshots on your Mac. I first show you how using key commands, this is usually how I do it, but I also show you how you can use the Grab app to create screenshots. With the Grab app we can add pointers and take a timed screenshot.