Fix for Boot Camp Problem with new 27-inch iMac
Yesterday I talked about my new 27″ iMac and how I was going to install Windows 7 on it via Boot Camp. I touched on a problem I found when installing Windows, and that was the default driver for the ATI cards.
Windows installs default drivers after installing the Windows kernal. The problem that I experienced was that the default driver Windows installed for the ATI video card was not the correct driver and thus left the screen completely blank. I found that I was not the only one having this problem, and after some Googling around, I came upon a solution that seems to work great.
- Reboot your iMac and hold the Option/Alt button down to bring up the boot menu.
- Arrow over the the Windows install disc and press Return/Enter
- Navigate through the Windows install process until you come across the install options (it’s right after the language selection screen).
- Select the Repair your computer option
- Choose the C: BOOTCAMP drive
- In the list of repair options, find Command Prompt at the bottom and select it
- In the command prompt, type of the following command
del c:\windows\system32\drivers\atikmdag.sys - Close the command prompt and reboot your machine back into your Boot Camp Windows
That’s it! The ATI video driver should be deleted and you are free to install the Apple drivers and Boot Camp software (found on the OSX install disc that came with your machine).