If your installation mode is correct but audio is missing or poor quality, use these specific driver packages: 1. Official Apple Boot Camp Support Software For the A1278 (Mid-2012), the Boot Camp Support Software 5.1.5621 is the standard. Boot Camp Support Software 5.1.5621 Installation : Extract the ZIP, go to BootCamp > Drivers > Cirrus ) and run the 2. Manual Cirrus Logic Driver (High Quality) Most A1278 models use the Cirrus Logic CS4206B : You can find updated versions on the Microsoft Update Catalog Dell Support : Some users find that the modified drivers from StuffedCow
: For those having trouble with standard installers, this tool can help "patch" and force-install correct drivers for older hardware. No audio in windows 10 - Apple Communities
Congratulations! You've successfully installed high-quality audio drivers for your Apple MacBook Pro A1278 on Windows 10. With these drivers, you should now enjoy improved audio quality and a more immersive experience.
Windows fails to properly switch the digital optical audio sensor off.
The most stable driver package for 64-bit Windows 10 on older MacBook Pro models is Boot Camp Support Software 5.1.5769
: This is widely cited as the most stable package for older 64-bit MacBooks running Windows 10.