I think Win7 64 bit is needed, & Apple provides the drivers for video...
Which drivers are included with the OS X Windows Support Software (drivers) download?
The Boot Camp 5.0 software includes these Mac drivers for Windows:
- Apple Bluetooth
- Apple Keyboard Support
- Apple Remote Driver
- Apple Trackpad
- Atheros 802.11 Wireless
- ATI Graphics
- Boot Camp control panel for Microsoft Windows
- Boot Camp System Task Notification item (System Tray)
- Broadcom Wireless
- Intel Chipset Software
- Intel Integrated Graphics
- iSight Camera
- Marvel Yukon Ethernet
- nVidia Graphics
- Cirrus Logic Audio
- Realtek Audio
- SigmaTel Audio
- Startup Disk control panel for Microsoft Windows
- USB 3
Which versions of Windows work with Boot Camp 5?
You can use:
- Microsoft Windows 8 (64-bit)
- Microsoft Windows 8 Pro (64-bit)
- Microsoft Windows 7 Home Premium (64-bit)
- Microsoft Windows 7 Professional (64-bit)
- Microsoft Windows 7 Ultimate (64-bit)
Windows XP, Windows Vista, and Enterprise versions of Windows 7 and Windows 8 are not supported.
I'm using Microsoft Windows 7 Ultimate (32-bit)
I previously had 64-bit but had the exact same problem. My drivers weren't able to update. Everything runs fine except I need my video to be updated and it won't allow me. Same issue with both 64/32 - bit.
Would upgrading to Windows 8 Pro (64 - bit) change anything?
I have a late 2011 21.5" iMac I was having this error as well as poor performance in BF4 I downloaded the notebook beta driver for 13.11 and now it works like a dream
here's the link
first, thanks for replying!!
next, my graphics card is an amd hd 6770m. i downloaded 13.9 mobility drivers(they appear on that page) and when going to install it says it can´t, theres an incompatible activator or something like that. actually, i didn´t tryed with 13.11. did you istalled 13.11 directly or did you first uninstall apple bootcamp provided drivers and then install de 13.11? i have an imac mid 2011. similar to yours. also 21,5". thanks!!
I found a solution that worked for me.
Download the file and install.
When I installed it said it had failed but it worked anyway.
It looked like it had stop in the middle of the installation but be patient, it will continue after a while.