audiomicrophonequicktimescreen capturevideo
So I learned that on the Macbook Pro, the default Quicktime Pro has the ability to record video from your computer screen. This is great, but it doesn't have the ability to record sound unless it's from the actual mic picking up sound from the speakers literally playing the sound.
Is there a way to get it to record sound regardless of what my hardware volume settings are at (in particular, even if I have muted the sound)? As in, record sound + video even after I've pressed F10 to mute.
The headphone jack had a red LED glowing inside, which clued me in that it thought there was an optical cable plugged in. Plugging and unplugging a pair of headphones resolved the problem.
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:
Best Answer
What you are looking for is LoopBack.