How to record both screen and sound with Quicktime on El Capitan? I'm trying to record both what's happening on screen and the audio being played by the applications. To my surprise, QuickTime did not record the sound. I believe it worked before in previous OS X releases, but that is not something that I use often so I have not bothered to try earlier.

What is the current situation on El Capitan ? Have I messed with something that prevents QuickTime from capturing the sound, or has it never worked ?

Here is my view of Quick Time  / New Screen Recording on a Mac Mini:


On my Macbook Pro, I have the option select None or Internal Microphone. Internal microphone actually records the speakers of the Mac Book as heard from its own microphone, which obviously sounds terrible.

This is a MacMini 7,1 (late 2014) and there is nothing in Input Sources.
You  need to install Soundflower in order to run it on El Capitan. El Capitan requires kext to be signed in order to load them. This one gets its kext installed in /Library/Extensions/.

This is due to System Integrity Protection

Then, you have to create a multi-output device with: Audio MIDI Setup.app, which is found in /Applications/Utilities/ :



Finally, when you want to do the actual recording, make sure you use this multi-output device, and capture from the same Soundflower device used in this multi-output device. Otherwise, you can't both listen to and capture the sound, because it goes directly to soundflower without being copied to the built-in output.

alt/option + right clicking on volume gives you this menu:



and Quicktime now looks like this: