When installed Windows 10 via Bootcamp on my late 2009 model iMac, I wasn’t able to install the Bootcamp drivers. Apple had hard-coded some versions and they rather sell you new hardware than supporting the older hardware. Since my late 2009 iMac is upgraded with memory and SSD, the 27″ monster is still fast enough for day-time use. But when installing Bootcamp drivers, this error appears:
This version of boot camp is not intended for this computer model
The fix is simple. After downloading the Bootcamp (v5.1) drivers via OSX, boot to Windows. Start an elevated command box and navigate to the path of your drivers. Copy the files from the USB disk over to your harddisk. In my case the path was: Downloads\bootcamp5.1.5769\BootCamp\Drivers\Apple.
Manually run: “msiexec /i bootcamp.msi” from there. The new Bootcamp drivers will be installed and yes, you Magic Mouse scroll-funtion will work again.