Screen Recording with Internal Audio Not Available.

to add to MartinR's reply.

to record the mac's internal sound with quicktime (or also “shift-command-5”) you need additional software. i use the free BlackHole Virtual Audio Driver. then you can choose "BlackHole 2ch" in the recording options instead of "Built-in Microphone."

you will also need to set up a multi-output device in your audio MIDI setup utility to be able to both hear and record the internal audio at the same time.

to set up a multi-output device:

Open Audio MIDI Setup: (found in /Applications/Utilities)

hit the '+' button in the bottom left corner and select "Create Multi Output Device"

then in the panel that appears on the right, in the Multi-Output Device tab, select "Built-in Output" AND "BlackHole 2ch". (and, if you want, any of your other connected devices.)

once you do that, (and BEFORE recording) you can choose "BlackHole 2ch" or "Multi-Output Device" in your menubar "sound options". 

to both hear the speakers and record the audio at the same time, choose "Multi-Output Device". before choosing multi-out, set the internal speakers' volume to a comfortable level first. you cannot control the volume once you are in multi-out mode.

Japesh_ wrote:

So, I am trying to screen record on my mac m4 but it isn't recording any internal audio. And I a college student so, I can't afford any subscriptions or any paid apps.

In that case about the only solution is Blackhole Audio (free). Once you install it, follow the instructions on the Blackhole website & Wiki about how to Route System Audio. Here is a video that will also walk you through the process.

Macs do not have built-in capability to screen record video + audio at the same time. Blackhole adds the capability to reroute audio.

That is by design. It is intended to prevent copyright infringement.