If you have no sound or a "No Audio Output Device is Installed" error, try these steps in order: Step A: Use Official Boot Camp Support Software
Finding the correct audio driver for a MacBook Pro A1278 (which covers 13-inch models from 2008 to 2012) on Windows 10 is a common challenge. These machines typically use Cirrus Logic Apple Macbook Pro A1278 Audio Driver Windows 10
Symptom: A red light is glowing inside the headphone jack, and no sound comes from speakers. Cause: The optical audio switch is stuck. Fix: If you have no sound or a "No
Windows Update or generic HD Audio drivers do not properly initialize the Cirrus Logic / CS4206 or CS4207 audio codec used in A1278 models. Fix: Windows Update or generic HD Audio drivers
Gently insert a pair of normal headphones or a wooden toothpick into the jack and wiggle it slightly to release the stuck microswitch. 🚀 Summary Checklist Identify your exact A1278 production year. Download Boot Camp 4.0 or 5.1 depending on your model. Run driver installers in Windows 7 Compatibility Mode.
Download Open Core Legacy Patcher on the macOS side of your machine.