This will allow you to capture both audio and video from your Mac's screen.

Finally, open the QuickTime player and choose File > New Screen Recording. You should see Loopback Audio listed as an input device. Then, open System Preferences and choose Sound. Once installed, open the media you want to screen capture in your application (e.g. Run Screen Recorder and select Audio Recorder option from the main interface. If you tend to only record audio instead of the screen, simply select the Audio Recorder. To record both screen and audio on a Mac, you will need to install Loopback Audio (a free extension). Step 1: Launch Screen Recorder on your Mac. When you are finished recording, click on the Stop button and save your video file so that it can be accessed later. Once you have made all of your selections, click on the Record button to start recording and adjust the volume control to hear any audio that is being recorded. If you want to adjust any settings for the camera or microphone, click on the Options pop-up menu and choose from the available options. This will open a window where you can select your camera and microphone for recording. To start, open the QuickTime Player app and then select File > New Movie Recording. To record video with sound on your Macbook Pro, you will need to use the QuickTime Player app.

Recording Video with Sound on a Macbook Pro

Screen record with sound mac