Why would anyone still use 4.0.4255 in 2025?
If you have recently installed Windows on your Mac (particularly models from the 2012–2015 era, including the iconic MacBook Pro Retina and Mac Pro “Trash Can”), you have likely encountered missing drivers, unresponsive keyboards, erratic trackpad gestures, or the dreaded “no audio output device found” error. This is where version 4.0.4255 enters the stage. boot camp support software 4.0.4255
This driver pack includes a comprehensive set of hardware drivers and utilities: Why would anyone still use 4
If after reboot you still have no sound: you have likely encountered missing drivers
This specific version is tailored for a narrow window of hardware. It is the designated support package for: MacBook Pro (13-inch, Mid 2012)