On this page:
https://www.usa.canon.com/support/p/pixma-ts6520#idReference%3Dsoftware-drivers
there are many drivers to download.
On of them is called: "Master Setup (Mac)"
Under that, you can expand it to show this description:
File Name
mms2-mac-104_0_0-ea21_3.dmg
File Description
This file will download and install the software needed to utilize your prodcut. Once complete, you will be able to install additional software to enhance the product's functionality.
