How To Record Internal Audio with QuickTime on MacBook pro 2017?

Hello netadrian,

Thank you for using Apple Support Communities! I understand that you're wanting to know how to record internal audio on your MacBook Pro using QuickTime. I would be happy to help provide more information.

Check out the "Record" section in the support article below, which will walk you through how to choose the audio source for QuickTime recordings. Selecting "Built-in Microphone" specifically should allow you to record internal audio:

How to use QuickTime Player - Apple Support

Cheers!