Note: This will give you working sound, but the microphone input levels may be low. It solves the "hot" output issue perfectly.
If you are already in Legacy mode but still lack sound, you may need to manually point Windows to the correct drivers:
Method 1: The Ultimate Fix – Reinstalling Windows 10 in Legacy Mode
(dated roughly 2013) is often cited as the last stable version for this hardware. Manual Installation Boot Camp Support Software macbook pro 2012 audio driver windows 10 hot
The Mid-2012 MacBook Pro is a "pre-UEFI" model. This means it does not properly support the modern UEFI (Unified Extensible Firmware Interface) boot standard for Windows. For all hardware like audio, Wi-Fi, and graphics to work, Windows must be installed in (also known as CSM or "Boot Camp" mode).
Restart your computer. Your red "X" over the volume icon should disappear, and sound should play normally. Step 2: Fix the Red Light in the Headphone Jack
Your CPU will now run at 65–75°C under load instead of 95–100°C. The audio chip will remain stable. Note: This will give you working sound, but
Select the partition you created in Disk Utility (labeled BOOTCAMP) and click to convert it to NTFS.
The 2012 MacBook Pro uses a specific Cirrus Logic CS4206B audio controller. Windows 10 frequently tries to install a generic High Definition Audio driver that doesn't actually communicate with the Mac's speakers.
chip. Standard Boot Camp installers often miss this or fail to activate it in EFI mode. 1. Download the Correct Driver Navigate to a reputable driver repository like DriverScape to find the Cirrus Logic CS4206B (AB 82) Download the Manual Installation Boot Camp Support Software The Mid-2012
If you see the error "" next to your High Definition Audio Controller in Device Manager, or if your sound icon has a red "X", your Windows is likely installed in UEFI mode .
Right-click "High Definition Audio Device" (it may have a yellow warning triangle). Select > Browse my computer for drivers .