1. QuickTime Player & BlackHole

- Price
Free
- CNET rating
Why I picked it: I chose this method because it's a strong free solution combining built-in macOS software with a free virtual audio driver. It proves you don't always need to download new software, just a clever free utility.
I started with QuickTime Player, which is pre-installed on every Mac. It's incredibly simple for recording your screen and microphone. However, by default, it cannot capture your Mac's internal audio, like music or video sound from a browser. To solve this, I used a free application called BlackHole. It creates a virtual audio device that routes your system sound to a place QuickTime can record it. In most setups you also create a multi-output device in Audio MIDI Setup so you can hear the audio while it’s recorded.
After installing BlackHole, the process is straightforward. I selected "BlackHole 2ch" as the microphone input in QuickTime's recording options. This tricks QuickTime into recording both my voice (if I want) and any sound playing on my Mac. It's a bit technical to set up, and macOS updates can occasionally require reconfiguration, but it works reliably once configured.