How do I make sure the audio is also recorded on my screen recording process? I have turned on the internal microphone option but my screen recording doesn't have a sound.

to record the mac's internal sound with quicktime 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.

EDIT - I see now the jeffreythefrog beat me to it - and with detailed pictures, too. Just follow his advice.

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First of all, you CAN record your screen with audio.

Second: to be more specific, are you trying to record audio that is being played on your mac? This requires a little work, but it can be done. If all you want is record other audio captured by the microphone, that is easier.

I am assuming that you mean the former.

This will require a piece of additional software, but then you will record using the same Quicktime Player "New Screen Recording" or directly with Command-Shift-5 in the Screenshot application.

1) Download and install BlackHole Audio Driver

2) This adds some new audio input and output options, which you will be able to see in the menu bar or in System Preferences->Sound

3) You can now use these two "BlackHole 2ch" virtual devices to route audio output from one application to the input of another

4) You can set the system output to "BlackHole 2ch", and in Quicktime Player select the audio input as BlackHole 2ch, and record

BUT doing it this way, you won't be able to hear anything, as you record.

To be able to monitor the audio via the speakers or headphones at the same time it's being recorded, you need to be able to send the output to two devices at the same time.

This requires creating a Multi-Output device, in Audio MIDI Setup (this is a program already on your mac, in /Applications/Utilities).

5) Open Audio MIDI Setup, click the + button at the bottom left and choose "New Multi-Output Device". Add both "BlackHole 2ch" and the speakers (or headphones) to this new device.

6) Proceed as in 4), but now for system output you should select the new Multi-Output Device created in the previous step.

You can now monitor and record the audio at the same time.

In order to capture (record) the Mac's internal audio you need an application like Loopback, Audio HiJack or similar audio capture app. There are a few free alternatives around but I do not recommend them as all the ones I have seen to date have problems of one sort or another. Loopback & Audio Hijack are not free, but they work really well.

There are also stand-alone screen capture apps that provide much more capability than QuickTime for recording screen video + audio. I use Telestream's ScreenFlow, which has given me excellent results. Again, not free, but imho well worth the money.

Also, here's an article about using Loopback with QuickTime to record audio + video -> Recording Your Mac’s Video Screen with Audio

Hello skaze001,

It will be necessary to use an alternate method to record audio while simultaneously recording video on your Mac through QuickTime. We recommend browsing for an app or add-on that meets your needs.

Regards.