2013年之前生产的MacBook（包括A1278）在UEFI模式下安装Windows 10时，UEFI固件默认不会将Cirrus Logic CS4206B音频控制器暴露给Windows操作系统。这意味着无论你安装什么驱动程序，Windows都无法“看到”声卡硬件。
This comprehensive guide covers why this error occurs, how to fix it, and the precise steps to achieve pristine sound quality. Why the Apple MacBook Pro A1278 Loses Audio on Windows 10 apple macbook pro a1278 audio driver windows 10 high quality
Install Windows 10 on your Mac with Boot Camp Assistant - Apple Support how to fix it
Windows 10 security blocks legacy Apple drivers if you run the standard installer executable. You must force the installation using compatibility settings. then click the Compatibility tab.
Do you need the specific for your A1278 to find a direct driver download link?
You need the last stable driver packages released for these legacy machines.
Right-click the installation file (usually DPInst.exe or Setup.exe ). Select , then click the Compatibility tab.