BlackHole 2ch for Mac

BlackHole 2ch by Existential Audio is a powerful virtual audio driver for macOS that allows users to route audio between applications with zero additional latency.



Designed primarily for musicians, podcasters, streamers, and audio engineers, BlackHole enables internal audio recording and advanced sound routing without requiring external hardware.

Unlike traditional audio loopback solutions, BlackHole operates entirely within macOS using Core Audio, offering high-performance routing with minimal CPU overhead.

The 2-channel (2ch) version is ideal for users who need simple stereo routing between apps such as Logic Pro, GarageBand, OBS Studio, Zoom, or QuickTime.

It has become a popular solution in the Mac audio community thanks to its open-source development model, stability, and compatibility with modern macOS versions.

The FileHorse review team recommends this product for users who need reliable internal audio routing for professional or creative workflows.

Main Features

Zero Latency Audio Routing: Routes audio between applications without noticeable delay.

2-Channel Virtual Device: Provides a stereo virtual audio interface for internal recording and streaming.

Core Audio Integration: Fully compatible with macOS Core Audio for stable performance.

Multi-Output Device Support: Works with macOS Audio MIDI Setup to create aggregate or multi-output devices.

Open-Source Architecture: Transparent development and continuous updates from the audio community.

Low CPU Usage: Optimized to run efficiently even on older Mac hardware.

Compatibility with Recording and Streaming Apps: Works seamlessly with DAWs, OBS, Zoom, and other audio tools.

User Interface

BlackHole 2ch does not include a traditional graphical user interface. Instead, it integrates directly into macOS as a virtual audio device.



After installation, it appears in the system’s Sound settings and in Audio MIDI Setup as an available input and output device.

This minimalist design may initially surprise users who expect a control panel. However, this approach ensures stability and avoids unnecessary system overhead.

Configuration is done through macOS system preferences and supported audio applications, making it clean and unobtrusive.

Installation and Setup

• Download the installer package from the official Existential Audio website.
• Open the .pkg file and follow the on-screen installation instructions.
• Grant necessary system permissions if prompted.
• Restart your Mac if required (usually not mandatory on newer macOS versions).
• Open System Settings → Sound to confirm BlackHole 2ch appears as an audio device.

For advanced routing, open Audio MIDI Setup and create a Multi-Output Device combining BlackHole with your speakers or headphones.

How to Use

1. Open Audio MIDI Setup from Applications → Utilities.
2. Create a Multi-Output Device if you want to monitor audio while routing.
3. Set this tool as your system output device (or within a specific app).
4. Open your recording or streaming software.
5. Select BlackHole 2ch as the input source inside that application.
6. Start recording or streaming.
7. Adjust levels inside your DAW or recording software as needed.

This process allows you to record system audio, capture music from apps, or route sound between creative tools without cables.

FAQs

Is BlackHole 2ch free?
Yes, this program is available as a free open-source project. Donations are encouraged to support development.

Does BlackHole add latency?
No, it is designed to operate with zero additional latency using macOS Core Audio.

Can I record system audio with it?
Yes, it enables internal system audio recording when configured properly.

Is it compatible with Apple Silicon Macs?
Yes, it works on both Intel and Apple Silicon Macs.

What is the difference between 2ch and 16ch versions?
The 2ch version supports stereo routing, while the 16ch version allows advanced multi-channel routing for professional setups.

Alternatives

Soundflower – An older open-source virtual audio driver, now largely replaced by modern alternatives like BlackHole.

Audio Hijack by Rogue Amoeba – A powerful recording solution with visual workflow builder and advanced capture options.

Loopback by Rogue Amoeba – A premium virtual audio routing tool with a graphical interface and advanced routing matrix.

VB-Cable (via virtualization setups) – Basic audio routing solution, more common on Windows systems.

Pricing

BlackHole 2ch is FREE to download and use.

The developer offers optional donation-based support for users who wish to contribute financially.

There are no subscription plans or paid tiers for the 2-channel version.

System Requirements

• macOS 10.10 Yosemite or later
• Intel or Apple Silicon processor
• 64-bit macOS system
• Core Audio compatible environment

PROS

• Free and open-source
• Zero-latency performance
• Lightweight and efficient
• Works with major Mac audio apps
• Simple installation process
• Stable Core Audio integration
• Ideal for streaming and podcasting

CONS

• No graphical interface
• Initial setup may confuse beginners
• Requires manual configuration in Audio MIDI Setup
• Limited to stereo routing in 2ch version
• No built-in audio mixing controls
• Relies on macOS system configuration

Conclusion

BlackHole 2ch by Existential Audio is one of the most efficient and reliable virtual audio drivers available for macOS.

It offers zero-latency routing, seamless Core Audio integration, and broad compatibility with professional recording and streaming software.

While it lacks a traditional interface and may require some technical setup, its performance and flexibility make it a top choice for creators who need internal audio routing on Mac.

For podcasters, musicians, content creators, and remote professionals who frequently capture or redirect system audio, it delivers a clean and powerful solution without subscription fees or unnecessary complexity.