Hello rhalp,
The 8500C is a series of printers and you will need to check the number written on the printer to see which specific driver you need to install. The MF8580Cdw is the most common model of the printer. You can download the drivers for the MF8580Cdw using the link below.
https://www.usa.canon.com/internet/portal/us/home/support/details/printers/color-laser/mf8580cdw/col...
To assist further we would need some additional information, If you can reply with the information below, we can continue to assit.
- What is the model number written on the printer itself?
- What version of the Mac or Windows operating system are you using on your computer?
