Speakers buzzing after update 27.2

Subject: MacBook Air Speakers Buzzing After macOS 27.2 Update

Thank you for reporting this issue. I understand that your MacBook Air speakers have started producing a buzzing or distorted sound following the macOS 27.2 update.

The problem could be software-related or caused by a hardware fault. Let's follow these troubleshooting steps to identify the source.

First, restart your MacBook Air and test the speakers again. A restart can resolve temporary audio problems following a system update.

Next, check your sound settings by opening Apple menu > System Settings > Sound. Under Output, select MacBook Air Speakers. Make sure Mute is disabled, the Balance slider is centered, and the volume is approximately 50%. Test the sound again. For additional guidance, see Apple's Change the sound output settings on Mac.

Try playing audio through different applications, such as Safari, Apple Music, YouTube, and a locally stored audio or video file. If buzzing occurs in only one application, the issue may be application-related. If it occurs across all applications, macOS or the internal speakers may be involved.

Disconnect external headphones, USB audio devices, and external displays. Temporarily turn off Bluetooth and test the built-in speakers again. This helps eliminate possible audio-routing conflicts. Apple provides additional instructions in If the internal speakers on your Mac aren't working.

Since the issue appeared after the update, check whether a newer compatible macOS version is available. Open System Settings > General > Software Update. If an update is available, back up your Mac before installing it. Restart and test the speakers again.

If the issue persists, test your Mac in Safe Mode. For an Apple silicon Mac, shut it down, press and hold the power button until startup options appear, select your startup disk, hold Shift, and select Continue in Safe Mode. Once logged in, test the speakers. If the buzzing disappears, a third-party application or startup component may be responsible. See Apple's Start your Mac in Safe Mode for further instructions.

You can also run Apple Diagnostics to check for possible hardware issues. Shut down your Mac and disconnect external accessories. Press and hold the power button until startup options appear, then press Command (⌘) + D. Follow the instructions and note any reference codes displayed. For Intel-based Macs, start the computer while holding D. Refer to Apple's Use Apple Diagnostics to test your Mac. A successful diagnostic test does not completely rule out a speaker fault.

To help narrow down the cause, please confirm your MacBook Air model and chip (M1, M2, M3, M4, M5), whether the buzzing comes from one or both speakers, whether it occurs in all applications, and whether wired or Bluetooth headphones produce clear sound. Also, does the buzzing happen at low volume or only at higher volume?

If headphones work normally but the built-in speakers continue buzzing, the internal speakers or their audio circuitry may require physical inspection. If both speakers and headphones produce distorted audio, a macOS or audio-processing issue becomes more likely.

At this stage, we cannot confirm whether macOS 27.2 or a hardware fault is responsible. Please share the results of these checks so we can determine the appropriate next step without unnecessary repairs or software reinstallation.