I have a iMac 27'' late 2013, I upgrade the original HHD for SSD before the upgrade I had windows 7 for few year in bootcamp without any problem but after I upgraded my big problem started,firts I use the bootcamp version 6.1.0 in x os Sierra and create a usb with the windows iso and drivers fallow the bootcamp app and tried to install windows and fail with errors not complete the installation after that I download the drivers from apple support website and replace the bootcamp drivers in the usb drive finally the installation was complete but few things not working in windows like video card,the keyboard etc in the end I remove the bootcamp partition ..any body experience the same issues if they solved please let me know how or if someone have the right drivers for this model please share I spend many hour trying to find out how resolve this issue thank you for reed this...