Master Mac Screen Recording: Capturing Video and Internal Audio Flawlessly

Screen recording on a Mac seems simple—and it is, thanks to the robust built-in tools in macOS. However, the real headache begins when you need to capture the sound coming directly from your computer, known as internal system audio.

Whether you’re creating a tutorial, recording a video meeting, or capturing gameplay, simply hitting Command + Shift + 5 often leaves your audio track empty. This is usually due to macOS security features restricting direct access to system sound outputs.

Fortunately, you don’t need expensive third-party software. Here is the definitive guide on how to get high-quality Mac screen recordings, complete with both external microphone input and that elusive internal system sound.

Method 1: The Built-in macOS Screenshot Toolbar (Mojave and Later)

For users running macOS Mojave (10.14) or newer, the dedicated Screenshot toolbar (activated via a simple keyboard shortcut) is the fastest and easiest way to start a screen capture.

Steps to Record Screen and Microphone Audio

1. Activate the Toolbar: Press Command + Shift + 5 simultaneously. This will bring up the recording toolbar at the bottom of your screen.
2. Select Recording Area: Choose to record the entire screen or select a specific window or portion of the screen.
3. Adjust Options: Click the Options menu button in the toolbar.
4. Choose Your Microphone: Under the “Microphone” section, select your audio source. This can be the “Built-in Microphone” or an external USB microphone you have connected.
5. Start Recording: Click the Record button. The recording icon will appear in your menu bar.
6. Stop Recording: To end the session, press Command + Control + Esc, or click the Stop button in the menu bar.

The resulting video file (usually saved to your Desktop) will contain the screen activity paired with your selected microphone audio.

Method 2: QuickTime Player (The Classic Approach)

QuickTime Player remains a staple for Mac users, offering reliable recording capabilities, especially useful if you are running an older version of the operating system.

Using QuickTime for Video and External Audio Capture

1. Launch QuickTime Player: Find it in your Applications folder.
2. Start New Recording: Go to File in the menu bar and select New Screen Recording.
3. Open Settings: A small recording window will appear. Click the small downward arrow next to the red record button.
4. Select Audio Input: Choose your desired microphone (Built-in or external).
5. Begin Capture: Click the red record button and follow the on-screen instructions to select your recording area.

Note: Both the Screenshot toolbar and QuickTime Player allow for easy microphone recording. However, neither provides a native way to capture sound playing from apps like Spotify, YouTube, or FaceTime directly.

The Critical Challenge: Recording Internal System Sound

If you want to create professional tutorials or record application demonstrations where the audience needs to hear the app sound, you must route your audio output back into your input options. This requires a dedicated virtual audio device.

Solution: Install a Virtual Audio Cable (BlackHole)

The most reliable modern solution for routing system audio on macOS is the open-source tool called BlackHole. It acts as a virtual microphone that channels sound internally.

Steps to Record Internal Audio on Mac

1. Install BlackHole: Download and install the BlackHole application (the free 16-channel version is usually sufficient).
2. Create a Multi-Output Device: Open Audio MIDI Setup (found in Applications > Utilities).
3. Add New Device: Click the plus (+) button in the bottom left corner and select Create Multi-Output Device.
4. Configure Outputs: In the list of devices, check the boxes next to your primary output device (e.g., “Built-in Output” or your monitor/headphone jack) AND the BlackHoledevice. Ensure “BlackHole” is checked for Drift Correction.
5. Set System Output: Go to System Settings (or System Preferences) > Sound > Output. Select the newly created Multi-Output Device. (Your Mac is now sending sound both to your speakers/headphones and to BlackHole).
6. Select BlackHole as Input: Launch QuickTime or the Screenshot Toolbar (CMD + Shift + 5). In the Options or Input menu, select BlackHole as your audio source.
7. Record: Start your Mac screen recording. The video will now capture the internal system audio.

Pro Tip: If you need to record your voice and the system audio, you will need to create a dedicated Aggregate Device in Audio MIDI Setup that combines your microphone input and the BlackHole input. Then select this Aggregate Device as your QuickTime input.

Pro Tips for High-Quality Mac Screen Recording

Optimize Your Workflow and Output

• Close Unnecessary Apps: Screen recording is CPU-intensive. Close background apps to prevent lag and ensure a smooth capture.
• Set the Quality: In QuickTime, recordings are generally saved as high-quality .mov files. If you need a smaller file size immediately, use a video compressor or editing software afterward.
• Check Storage Space: High-resolution recordings can quickly consume gigabytes of storage, especially if they are long. Ensure you have ample free space before starting a lengthy capture.
• Use an External Microphone: If you are recording voiceover, even a basic USB microphone will provide significantly clearer and richer audio quality than the built-in Mac microphone.
• Learn the Shortcuts: Mastering Command + Shift + 5 for starting and Command + Control + Esc for stopping will speed up your workflow dramatically.

Final Thoughts

Recording your Mac screen with external microphone audio is handled seamlessly by Apple’s native tools. The true trick to becoming a screen recording pro lies in mastering the virtual audio device setup.

By using BlackHole alongside the QuickTime Player or the modern Screenshot toolbar, you gain complete control over your audio streams, allowing you to capture high-quality videos complete with crystal-clear internal system sound. Now go ahead—start recording that perfect tutorial!