Thanks for the reply, arenniger. I’ll try to help you a bit more.. here’s how to do scanning stuff on an MG 6120 which is kinda close to your model: ( link)
https://support.usa.canon.com/kb/index?page=content&id=ART106734P
you could try using either Preview or Image capture, both of which are built into the Mac OS.
again here’s how to setup and add a scanner in mac os catalina.,,
https://support.apple.com/en-ca/guide/mac-help/mh28039/10.15/mac/10.15
if you navigate to system preferences, then printers and scanners, where you see a [+] and a [-] button, if you hold down the option key, and click on the [+{ button, you should see “ reset printing system’ try that. You can also remove + re-add the mg 6100. Lastly, try disconnecting the power cord from the printer then shutting down your mac. Disconnect the power cord to it for about a minute. Then plug it in, press the power button and immediately hold down apple, option, p and r keys together for 3-4 chimes, bongs or apple logo disappearances. Let go of those keys and let your mac start up as per usual.. after it has started up , then plug i the power cord to your printer and let it start up.. i think if you if have 2 canon printers to print from, as it seems you do, you should run canon network utility.. and give each a seperate ip address, assuming both are on the same basic network as your mac...
you’ve tapped me out of ideas for today. My ‘ canon’ is out of gunpowder and canon balls..
john b
