Resolved No Sound on 2011 iMac running Windows 8.1

[panzer06]

Everything else works, just no sound.

Tried the Realtek install and a reboot and nothing. Does anyone have any suggestions?

Cheers,

 

[doynton]

Did you install Windows using BIOS or EFI?

The 2011 Macs are preUEFI so they do not expose all devices at the EFI level, but they do in the CSM-BIOS layer that Bootcamp uses. If you want your Audio devices to show up, you will need to use CSM-BIOS (and hence Bootcamp). If you already have 3 partitions, they are not supported under the CSM-BIOS Bootcamp installation.

https://discussions.apple.com/thread/6770870

 

[freeuser]

my solution

has been an external Usb soundcard without the need of any drivers:

http://www.box-designs.com/main.php?prod=usbboxs&cat=source&lang=en

it works on my iMac 2011 Efi install Win 8.1

 

[panzer06]

Did you install Windows using BIOS or EFI?

https://discussions.apple.com/thread/6770870

EFI, this looks like my problem. I'll look into an external sound device to get around this.

I had all sort of trouble getting windows installed so perhaps the EFI was the issue. Maybe I should have used MBR when creating the partition on the drive I was going to install windows.

I ended up cloning my MSI GT70 windows 8.1 install. Booted up from TB with no issues. Immediately installed the BC drivers. Fastest windows setup on a Mac ever! Just no sound.

Thanks for pointing me in the right direction.

 

[panzer06]

Bought Creative Labs Omni Surround 5.1 external USB sound card. Windows sound works for now. Just need to find a legit Windows 8.1 Key on sale. Almost done with getting Bootcamp loaded with all my games!