SOLVED Lost ability to SCAN on Canon MF644Cdw all-in-one (possibly related to upgrading to Sequoia?)

[reveltop]

I can print, no problem. I can display the printer's status page via a web browser. Scanning is the only function where my iMac and the Canon cannot communicate with each other.

I've jumped thru all the hoops:

• Updated drivers to latest Sequoia-ready versions
• Manually deleted all drivers and reinstalled latest drivers
• Deleted and re-created printer/scanner (multiple times)
• Rebooted printer/scanner, router, and iMac
• Tried Wi-Fi & USB connection
• Etc

Nothing in my hardware setup has changed from the last time I was able to successfully scan. I have to assume it's Sequoia-related?

Spoke with Canon Support--they insisted it's either a) "not a good enough connection between the scanner and computer" or b) Software related... She said because I can print, display the printer's page via my browser...that it must be Mac (or ISP)-related.

Are there (security or other?) settings in Sequoia that might affect communication?

 

[reveltop]

(Partially) SOLVED: The only step I didn't perform during my extended attempts to get it to work was to install the FAX DRIVER. I don't need/won't use that function. so I didn't bother to install it.

When I installed it just now, I was able to see the device--but only with the MacOS Image Capture app. Neither of the Canon-supplied software can see the device: MF Scan Utility & MF Toolbox. Nice goin', Canon.

 

[reveltop]

I'm back to square one. There's some kind of issue between Sequoia and the Scanner drivers. I can do everything between the computer and the Canon except scan.

In an effort to continue to try to make the Canon utilities communicate with the device (after I got Image Capture working), I ended up back where now the device and the computer just won't acknowledge each other--for the scanning function. Again, printing, supply levels, print page via browser all work fine...

 

[reveltop]

I started over for the eleventeenth time... reset printer, uninstalled all drivers and other Canon software... and then TURNED OFF MY VPN and re-installed everything. Even tho I had "local network access" selected, it was borking the connection between the Mac and the Canon.

Image Capture AND the MF Scan Utility now work normally.

Canon MF Toolbox does not.

I'm counting this as a win.

 

[Rodananne]

It's kinda reasonable when you think about it. A VPN will change your IP address and I have found a couple of other things that don't work with VPN on, such as Handoff between my iPhone and MBP as well as the new iPhone Mirroring app in Sequoia 15.1