studawg66 - Thanks for your tip. It may help others to note that the approach you suggest only worked for my MX870 using a new (November 2017) iMac after I looked up what Launchpad was and launched it from there as you suggested, instead of from the...
Hi Chielmos, I made sure my MX870 and iMac were both on the same network with the correct printer driver and printed a page to make sure my problem was just with MP Navigator. Then I opened Preview, which is an app in the dock at the bottom of your M...
Finally got my PIXMA MX 870 to scan with High Sierra 10.13.1 using Preview on a new iMac. Wifi worked with auto doc feeder. Not quite MP Navigator, but it works.