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I've tried the solution here: https://discussions.apple.com/thread/250859372, but the Device Manager's 'Roll Back Driver' for the is grayed out. How can I downgrade my Broadcom driver?
I'm using a MacBook Pro 2015 running Windows 10.
Windows, Windows 10
teisnet wrote:
I didn’t install Windows before October so I never had other versions of the driver installed I assume.
The original installation of Windows should have provided the BC drivers, which may have been updated by Windows. However, BC drivers installation can fail. Was your Windows Wireless used at any point in the past, with reasonable performance?
Could I install the older driver directly, not using the Boot Camp Windows installer?
Yes.
teisnet wrote:
I didn’t install Windows before October so I never had other versions of the driver installed I assume.
The original installation of Windows should have provided the BC drivers, which may have been updated by Windows. However, BC drivers installation can fail. Was your Windows Wireless used at any point in the past, with reasonable performance?
Could I install the older driver directly, not using the Boot Camp Windows installer?
Yes.
In macOS, run BC Assistant -> Action -> Download and re-install the original Wireless Adapter driver.
See Download and install Windows support software on your Mac - Apple Support for reference.
Thanks for your answer!
I already followed the instructions and installed ("repaired") my Boot Camp installation in Windows. The WiFi download speed is still slow and the 'Roll Back Driver' button likewise still gray.
Both my Windows 10 and MacOS Catalina are up to date.
I didn’t install Windows before October so I never had other versions of the driver installed I assume. Could I install the older driver directly, not using the Boot Camp Windows installer?
(and thanks again)
Thanks for your helpful guidance and sorry for late answer! I went to the countryside and got distracted for a while.
I solved the problem by updating my driver in Device Manager:
"Update Driver" > "Browse my computer for driver software" > "Let me pick from a list of available drivers on my computer"
> "Broadcom 802.11ac, version 7.35.118.40 [24/07/2015]"
As mentioned previously the "Roll Back Driver" option was grayed out, which initially confused me.
What is the version of the Broadcom driver?
The Broadcom driver version is 7.77.110.0 (10/10/2019)
If the original drivers were installed, the version should be 7.35.x.x. The 7.77.x.x version is problematic.
Excellent!
WiFi download speed horrendously slow on Windows, great on MacOS (using Boot Camp)
