Do not use Boot Camp 6 or 7 (designed for newer Macs). They contain drivers incompatible with the A1278’s legacy hardware.
Older A1278 models (pre-2013) often fail to "expose" the audio hardware to Windows if installed in : The sound card doesn't even show up in Device Manager. : You may need to reinstall Windows 10 using Legacy/BIOS mode
Because Apple has designated the A1278 as "obsolete," no official Windows 10 driver update exists. The solution, therefore, emerges from the user and technician community. The most reliable method involves a forced manual installation using the driver package. The process is a technical workaround:






