First, press and hold “Option”, and then click on the Volume icon on the menu bar.Now that you have installed the app on your Mac, you can start recording screen and audio. Once you have done that, simply install the app on your Mac.To do so, simply visit this GitHub link, and click on the “” link to download the installer for Soundflower. In order to record both screen and audio on Mac computers, you will need to install Soundflower, first.Soundflower can let you make the iTunes output act as the input to the QuickTime screen recording, without having to rely on the Mac’s speakers and microphones (no matter how great they might sound). Stay tuned for more useful information and updates on technology.Soundflower is a Mac app that allows users to route audio from one application to act as the input for another application. Say, you’re playing a song on iTunes, and you want that song to be recorded in a screen record. There's also other software like Twitch's streaming software and Nvidia's gaming recording software that can record both sound and video at the same time. So this is one of the easiest ways you can record screen and audio at the same time. Go to your saved movie in QuickTime Player, and test out the sound. Trim the clip either in QuickTime Player or iMovie.You should be able to hear sounds now from your speakers. In the sound Output, change the preference back to Internal Speakers (or whatever was your original choice). At the top of your screen, click on the black square, which is the button to stop the Quicktime recording.After you’re done recording s top the video in your application that was playing your video.Go to the application that was set to play the video and then press play.Choose the appropriate audio source, in our case, the Loopback Audio software.Choose if you want to record all your screen or a portion of your screen, then click on the Record button.Go to the QuickTime Player application choose File/New Screen Recording.After doing this you will hear no sound from any of your Mac’s applications because the sound will be recorded with the Loopback software.Then in the sound Output, choose Loopback Audio in the Output option. Start at least 5 seconds before where you want to start – this will usually give time for the application to hide any playback controls which might be distracting. Open the media you want to screen capture in your application (if it’s a browser, use Firefox or Chrome.

Install loopback audio software on your Mac.

Quicktime player not recording audio