This is almost always a driver issue. Because the A1278 is an older model, Windows 10 often fails to find the correct audio hardware drivers during installation. This guide explains why this happens and provides step-by-step solutions to get your audio working.
Here are a few methods to find and install the correct audio driver for your Apple Macbook Pro A1278 on Windows 10: Apple Macbook Pro A1278 Audio Driver Windows 10
Performance and functionality notes
However, there is a notorious gremlin that plagues these machines: This is almost always a driver issue
Getting audio working on a MacBook Pro A1278 running Windows 10 is rarely a hardware failure; it is a legacy driver compatibility issue. Here are a few methods to find and
Practical recommendations
Never download drivers from random "driver finder" websites offering paid fixes. They are malware. The only safe sources are Apple’s official servers ( swcdn.apple.com ) and GitHub repos with visible source code.