Down graded Broadband 802.11ac Network Address to previous version 7.35 (Latest was 7.7, can't see 5Ghz wifi) Turned off bluetooth in mac os. All of the above didn't worked, until I down graded 'Broadcom Serial Bus Driver over UART Bus Enumerator' to previous version. I got the prev version from boot camp windows drivers though. I installed Windows 10 (April 18 update) on external SSD drive that can be selected on the iMac's startup. Run the Boot Camp Windows Support Software and everything is fine, Apple mouse & keyboard, except audio is missing. Windows 10 Device Manager app does not show any problems with the drivers such as yellow triangles or red crosses. Uninstall all the default Nvidia Windows drivers, and keep the eGPU monitor plugged in during the startup, then install the latest from Nvidia's web site. AMD cards are easier to get working with Windows 10 built-in drivers.
I installed Windows 10 (April 18 update) on external SSD drive that can be selected on the iMac's startup. Run the Boot Camp Windows Support Software and everything is fine, Apple mouse & keyboard, except audio is missing. Windows 10 Device Manager app does not show any problems with the drivers such as yellow triangles or red crosses. In fact, when a video is played the green volumen bars in the audio device driver properties move but there is no sound at all.
- iMac is the latest 2019 model.
- Windows 10 is up to date according to Windows update app (had to use April 18 update as start version since the installation does not work with October 18 version).
- Drivers are update to date according to Windows.
- Installed Windows 10 on external SDD following these instructions: https://blog.macsales.com/40947-tech-tip-how-to-use-boot-camp-on-an-external-drive, https://medium.com/@svenkirsime/install-windows-on-the-external-ssd-hdd-for-your-mac-5d29eefe5d1, https://www.youtube.com/watch?v=910Y1hLreRc&t=117s.
iMac Line (2012 and Later)
Posted on Apr 19, 2019 1:38 AM
I was running into the same problem when I upgraded from Windows 7 to Windows 10. After searching through the settings, I found a solution that appears to resolve this issue.
To fix this problem:
- Go To - Settings>System>Display
- Turn Off 'Adjust My Screen Brightness Automatically' Setting
I hope this helps. If anyone is having problems with Windows 10 bootcamp, I would strongly recommend installing the most up-to-date bootcamp drivers. I lost my F-key functionality after the upgrade, and reinstalling the updated drivers resolved that issue.
Bootcamp Drivers Windows 10 Macbook Pro 2012
The following link explains the process to reinstall updated bootcamp drivers:
Bootcamp Drivers Windows 10 Macbook Pro 2011
Aug 15, 2015 5:04 PM