If you are having difficulty finding what you are looking for, you can contact your sales representative or service personnel at (905) 405-1549.
Here is a Windows Driver – for Models:
3501i/4501i/5501i/6501i/8001i/3051ci/3551ci/4551ci/5551ci/6551ci/7551ci KX XPS Driver 1.3.2929 for Win7, 2008, Win8, 2012 (32 and 64 Bit)
Here is a Mac Driver – For All Models
OSX 10.5, 10.6, 10.7, 10.8, 10.9, 10.10 Installer
Kyocera OS X 10.5+ Web build 2014.10.20(1)