Hi i am trying to help my old friend get the sound to work on his i-mac. Eventually there was a software update of some sorts for osx el capitano. I have windows 10 professional installed on my macbook air. Cirrus logic cdb4210 high definition audio driver 7.25.44.1 for windows 8/windows 8.1.

This guide is useful if you have the following problem 1. I even rolled back the driver and updated again to confirm it works, and it sure.Īll UEFI boots in boot camp (at least on this model) sounds drivers and hardware will not work (it is simply not possible, not even an issue of drivers.) There are a few ways to change a boot from UEFI to Legacy (BIOS), but the easiest and least confusing is using the software 'Winclone' available for your mac OS.ĬIRRUS LOGIC BOOTCAMP DRIVER (cirrus_logic_6204.zip) The driver was taken, and, after a restart, the microphone now showed up (even though it was still showing CS4208 AB 108).

Since posting my original question we have been able to locate and download a CirrusAudioVista64 sound driver, but have not so far been able to get Windows 10 to admit to it's existence on the hard drive, even when we delete the sound drivers that Windows 10 wants to use, it just re-loads them on the next boot-up.