Inside this folder, you will see files named CirrusAudio64.exe or individual driver files ( CirrusAudio.inf , CirrusAudio.sys ). Step 3: Install the Driver

Here are the proven methods to get your sound working.

Point the search to the extracted folder: BootCamp > Drivers > Cirrus . Ensure is checked and click Next.

Right-click and select Set as Default Device . Right-click Digital Audio (S/PDIF) and select Disable . Use Device Manager to Force Install

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: Windows 10 attempts to install a generic Microsoft High Definition Audio driver, which fails to communicate with the specific Cirrus Logic architecture.

If you completed the installation steps and still do not hear sound, apply these sequential adjustments:

If you installed Windows 10 via EFI boot mode rather than standard legacy Boot Camp, Windows cannot properly communicate with the logic board's audio routing hardware.

Since finding the correct driver can be challenging due to the age of the machine, here are the most reliable sources:

The most reliable driver is found in the official Apple Boot Camp 5.1.5621 package.

Because these drivers were originally signed for Windows 7 or Windows 8, the Windows 10 installer might block them unless you use compatibility mode. Right-click on and select Properties . Click on the Compatibility tab.

Click and navigate to the extracted Boot Camp folder from Method 1 ( BootCamp > Drivers > Cirrus ). Select the .inf file (e.g., clhda.inf ).