Q: Need instructions/advice for no audio problem Win8.1 pro on mid 2012 MBP
Thank you for taking your time in looking into my question.
My Machine: Mid 2012 non retina Macbook Pro
What I wanted: To install win 8.1 pro 64bit on a second SSD completely (No Partition)/replacing the optical drive
My Problem: Everything works great, but no audio. Drivers seem to be the issue:
1. I put the clean ssd in main bay + optical drive with win 8.1 disk
2. Windows disk booted and Installed windows 8.1 64 bit without errors
3. Installed bootcamp support drivers
4. returned the Mac ssd back to the main bay and put the windows ssd in caddy then in optical bay
5. Start up consists of holding alt and choosing between mac os, recovery, and efi boot(which contains windows)
What I have tried(all of the following have been ineffective):
1. Reinstalling/repairing bootcamp support drivers from different sources (from the download on apple website and from bootcamp assistant application)
2. Reinstalling realtek drivers
3. Installing intel hd 4000 graphic drivers(found a source that said this would do the trick, it didn't)
4. Uninstalling High Definition Audio controller (it always seems to come back)
5. manually downloading and installing cirrus drivers from http://www.stuffedcow.net/files/CS4207_WinVista_Win7_32-64-bit_6-6001-1-30.zip
I get the following error:
6. Placing the windows ssd in the main bay
7. troubleshooting sound (was 99% sure this wasn't going to work)
8. Throwing my hands up in utter despair and crying uncontrollably afterwards (was probably the most effective out of the 8)
What I need clarification on:
I have found found some sources say that installing windows via EFI mode causes no audio, however I am unsure if the way I installed it is considered efi mode as I never was given an option for efi mode. However when I start up and hold option the name of the windows disk is named "EFI BOOT." Is the way I installed windows considered efi mode?
What I need instructions on:
Some sources say I need to install windows in hybrid MBR mode however I am not sure how I would install windows any differently that the way I did it above. How do I go about installing not in efi boot mode if I want to devote the entire ssd to windows/what would I do any differently that the steps I listed up there?
Thank you so much once again for your time and help!
MacBook Pro, iOS 10
Posted on Oct 2, 2016 12:05 AM
The Windows must be in the main bay and must stay in the main bay after installation. You need to either use BC Assistant and create a USB Installer which will also create a legacy BIOS/MBR W8.1 (default for your specific model) or if you choose to do it manually, make sure you choose the Windows icon from the Installation media, not EFI Boot.
If you just boot from the W8.1 DVD, the default is EFI Boot. BC Assistant does quite a bit of work for you, so avoiding it is not such a good idea.
Posted on Oct 2, 2016 2:04 PM



