Sometimes, Microsoft's automatic updates can break the audio. Apple pushes specific fixes for Boot Camp drivers via its own updater.
Install Boot Camp drivers
Download Open Core Legacy Patcher on the macOS side of your machine.
The specific audio hardware in the A1278 is the or sometimes identified as the AB82 version. This is a high-fidelity, low-power audio codec designed specifically for Apple’s integration needs. Because this hardware is proprietary and unique to Apple devices, Microsoft Windows does not include a generic driver for it. Apple Macbook Pro A1278 Audio Driver Windows 10
: If you see a "Windows" icon with an orange disk during boot, choose that instead of the "EFI Boot" icon to trigger a legacy installation. 2. Installing the Correct Drivers (Cirrus Logic & Realtek)
This is the only 100% guaranteed way to restore internal speakers and the headphone jack.
The core issue is usually not just a missing driver, but how Windows 10 was installed. On older MacBook models like the Sometimes, Microsoft's automatic updates can break the audio
Install Windows 10 on your Mac with Boot Camp Assistant - Apple Support
As highlighted in Apple community discussions , if you installed Windows 10 using instead of the older BIOS (Legacy) mode, the audio driver might not work because the hardware is not properly exposed to Windows.
If your installation mode is correct but sound is still missing, you likely need a specific hardware driver. The MacBook Pro A1278 typically uses or Realtek audio hardware. Using Boot Camp Support Software The specific audio hardware in the A1278 is
Open Command Prompt as an administrator (Type cmd in the Windows search bar, right-click it, and choose ).
Inside this folder, you will find files named CirrusAudio64.exe or similar executable driver installers. Step 3: Force Compatibility Mode Installation