There is something you can do to bring this back to a baseline where you should be able to install the driver that you had and have it work properly. To do this you'll have to reset the printing system on your Mac. I can give you the specific steps to do that. If you have other printers however, you will have to reinstall those printers as well. Here are the steps to reset the printing system:
Please let me know if you still questions.
Have you used the laser scribe the system? Or is that what you are referring to? That does print excellent discs but it is incredibly slow as you said.
I have even checked through the service manual and I honestly do not believe that this option is something that you can set in service mode. I was fairly certain that it was impossible, but I'm not always right of course so I went to the service manual and there is no mention of it in their whatsoever. And the service manual is for both US and Canadian and European models. I will go through it one more time very thoroughly, but according to Canon, that functionality is in the driver specifically.