Hi,
I have been using my canon MF229dw for almost 3 years with no issues with duplex printing on my macbook. I recently updated the printer driver (which now shows in printer/scanner preference as MF220), however since the new driver was installed, I have not been able to print duplex.
I use Mac (Mojave 10.14.6) and the duplex box is checked, however it does NOT print 2 sided. I have uninstalled and re-installed the printer driver twice with no luck.
Any suggestions? Thanks,