What software would you suggest to read DWG with OS Yosemite

Well,

Which is it?

They are two different things.

You do not need a special driver for your printer to print any drawing files. You need an app that will read the appropriate file type and be able to output it to your printer.

If you need an updated printer driver for your Canon Printer, check the Canon Support area of their website for updated printer drivers for OS X Yosemite.

Are you looking for an updated print driver for your printer OR a app to read .dwg files?

For viewing and printing .dwg files,

Look at this.

http://www.edrawingsviewer.com/ed/edrawings-mac.htm

The current Canon driver is available for automatic install when you delete and re-Add that printer.

Please read here about how we get drivers now on OS X:

OS X: Printer and scanner software available for download - Apple Support