Open the extracted folder and navigate to: BootCamp > Drivers > Cirrus (or Realtek , depending on your specific logic board).
If the red light persists inside the headphone jack, the digital switch might be mechanically stuck.
A common hardware quirk with the A1278 is the headphone jack. This jack doubles as an optical digital audio output. Apple Macbook Pro A1278 Audio Driver Windows 10
To fix this, you need to manually install the audio drivers from an earlier Boot Camp version that included support for the Cirrus Logic CS4206B audio chip. Step-by-Step Installation Process
The most reliable fix is manually downloading and extracting the final legacy Boot Camp driver packages directly from Apple. For the A1278 models, or 5.1.5640 contains the correct 64-bit drivers for Windows 10. Step-by-Step Installation: Open the extracted folder and navigate to: BootCamp
Double-click the executable to install the driver. Restart your computer when prompted. Method 2: Manual Installation via Device Manager
, the does not expose the sound card to Windows, meaning no driver will work until the installation method is corrected. 1. The Primary Fix: Reinstalling in Legacy BIOS/MBR Mode The most reliable way to get sound working on an This jack doubles as an optical digital audio output
Right-click the speaker icon in your system tray (bottom right corner) and select . Go to the Playback tab. Right-click your active speakers and select Properties . Go to the Advanced tab.
While getting the audio driver for an Apple MacBook Pro A1278 on Windows 10 can be a challenging task, it is by no means impossible. The key to success lies in understanding the hardware's limitations: using a Legacy (BIOS) installation of Windows and the correct Cirrus Logic drivers from the package.
If you see a red light glowing inside your headphone jack and still hear no sound, your MacBook thinks a digital audio toslink cable is plugged in.