As a temporary fix, searching for where the microphone is in the hope of placing something physical over it.But this has the same effect as the previous attempt (no sound from the microphone, but also no sound from the computer). Opening Audio MIDI Setup -> MacBook Pro Microphone -> 'Mute'.

This does indeed prevent background noise from the microphone being recorded, but also causes the screen recording to record without any audio, that is, it fails to capture the 'computer audio' (for lack of a better term)

System Preferences -> Sound -> Input -> MacBook Pro Microphone -> Input volume to zero.

To reduce/remove the background noise, I've tried: This captures the 'computer' audio, but it also records unwanted noise in the physical environment. When you’re finished recording, click on the Stop button to stop the recording. Step 3: Start recording your audio by clicking the Record button. When using cmd + shift + 5 to screen record, there is only one option present for sound (Macbook Pro microphone). To record internal audio on your Mac with Quick Time, follow these simple steps: Step 1: Click on the File menu.

Screen record mac with internal audio