4. A rectangle with a dashed outline and a menu at the bottom will appear on your desktop. From the menu, you can choose to record your full screen, select a portion of the screen to record or record a selected window. You can also use this feature to take a screen capture of a window or part of the screen with the QuickTime recorder, as well.
5. Click Options from the menu and choose Other location to select where you want to save your screen recording.
6. Once you’ve chosen the QuickTime Player window to record your video, click Record.
7. While your video is recording, look at the top menu bar of your Mac. You should see that a Stop button has appeared along with any other icons present on the right side of the menu bar. Click this whenever you’re ready to stop recording.
8. After you stop the recording, your new video will open automatically.