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macos aggregate device not working

Ask By Ngozi A.1,456 views

I tried to make an aggregate device to use two interfaces but I get no sound

Brand
Apple
Model
Mac mini M2
Connection
USB
System
macOS 15
Browser
Safari 18
Sample Rate
48 kHz
Output Channels
2 channels
Drivers And Sound SettingsMac
Tool used in this discussionSound TestQuick left, right and stereo check for any speakers or headphones
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Short Answer

Aggregate devices need matching sample rates and one clock source. Set the same rate and drift correction.

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Rishabh Sharma
Rishabh SharmaAudio Team
Audio DSP Engineer · 5+ years experience · Answered Apr 7, 2026

Two devices run on different clocks, which cause errors unless one is the master.

After you make the change, play the Sound Test again to confirm the result. If the problem is still there, add your device, browser and what you tried in the replies so the team can narrow it down.

Step By Step Fix
  1. Open Audio MIDI Setup
  2. Set the same sample rate on both devices
  3. Enable Drift Correction for the second device
  4. Select the aggregate in System Settings
Sources
  1. Apple Support

Checked by Elise Dubois on . How we verify answers

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Community Replies 1

  • Rajat PatelCommunity Member

    Drift correction fixed it. Hope that saves you some time.

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Rishabh Sharma
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Rishabh Sharma

Audio DSP Engineer at Sound Test

Rishabh Sharma is the Audio DSP Engineer on the Sound Tester Audio Team. Expert in browser-based Web Audio API architecture, live tone generation, and low-latency decibel tracking. Shares detailed digital sound processing codebases on GitHub and LinkedIn. On Sound Tester he answers browser, driver and operating system sound problems on Windows, Mac and Android, and reviews how the tools handle audio in the browser.

Web Audio APIlow-latency audiodecibel tracking
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