Canon MP495 series will not operate from Scanner/Printer Pane

To scan via the Scan tab of Printers & Scanners or scan via Apple's Image Capture application included with Yosemite you need to have a supporting ICA driver installed. To check that you already have this driver installed, open /Library/Image Capture/Devices. Here you should see a plugin labelled CanonIJScanner1 (there could be others ending with a different number). If it is present then you have the supporting ICA driver installed. If you don't see CanonIJScanner1 then here is a link to that driver.

So with the ICA driver installed open Image Capture and if the MP495 is networked then select the Shared section and it should be listed. If yes, select it and then see if you can perform an overview of a document placed on the platen (glass). Does this work?

sqwark wrote:

however there are 0 devices showing in Image Capture

With 0 devices showing in Image Capture, and assuming the MP495 is connected to your local network via WiFi, then you may have an issue with Bonjour. For many Yosemite users with the same issue this was resolved with the 10.10.4 update, as Apple returned the mdnsresponder process to assist with network device discovery. So have you applied the 10.10.4 update?

If you have and the MP is not listed (below is an example of what you should see) then open Printers & Scanners and select to add a printer. With the Default view selected the MP495 should be listed. Is it shown with Bonjour Multifunction in the Kind column or Canon IJ Network?

sqwark wrote:

there is no Scanner Sharing option in Services on the Sharing Pane

This was removed in Yosemite and rightly so. And even if it was still present it would not impact your ability to see/or not see the MP495 scanner via Image Capture.

sqwark wrote:

the Canon MP495 series device on the Print/Scan pane page shows as Offline.

So is this the networked MP495 showing as Offline? Because if at any time you had connected the MP495 to the Mac then a printer would have been automatically created for this USB connection. And if you disconnect the MP495 USB cable because you created a new printer for the network connection, then this printer for the USB connection will show as Offline.

sqwark wrote:

PS. With the USB plugged in from the Canon MP495 series the device shows under devices on Image Capture.

So with the USB connected MP495 appearing in Image Capture, are you able to scan using this application?

Interesting. Cause the Scan tab that should be appearing in Printers & Scanners uses the same interface as Image Capture. In fact, if you did have the Scan tab and had it selected and then tried to open Image Capture, you get a prompt stating that the application is already in use. So it confirms that the ICA driver is okay - MP Navigator uses a different scanner driver.

So the question is why does the MP495 not appear as a Bonjour Multifunction device. Based on your previous images (thanks for those) the Add printer window is not showing a Bonjour Multifunction entry for the MP495. The Bonjour entry that is displayed is for the memory slot on the machine, so that you can scan images from an inserted memory card. And this does not normally appear in the Add Printer view, so the fact that you can see this is interesting and probably an indicator that your setup is the cause of your issue.

What is also interesting to see is that for the printer that you did create using the Canon IJ Network (your default printer) the Location is showing a computer name. This does not happen in normal setups. When you add a network printer the Location section is blank. So why is a computer name (I assume its the name your iMac is using) is listed? I thought it may be due to you having Printer Sharing enabled your local iMac. But my testing has shown that is not the case. So based on your image I would have to assume that you are not connecting directly to the MP495 via WiFi but connecting to another Mac that is sharing the connection. And if this is the case then you will not be able to connect to the scanner (which now makes sense that you mentioned not having the shared scanner setting under the Sharing pane of System Preferences).

So can you confirm; is the MP495 connecting to a wireless router via WiFi? And then the iMac discussed here also connects via WiFi to the same wireless router?

sqwark wrote:

There is no solution to this longstanding Canon/Apple fault. The Canon MP945 series Scanner cannot be opened from the Printers & Scanners Print/Scan pane on WiFi.

I finally found a working MP495 and connected it to my WiFi network. I then opened Printers & Scanners and found that two MP495's were listed as shown below.

When I selected the entry shown as Bonjour Scanner, this created a separate MP495 under the Scanners heading as shown below.

When I selected this MP495 under the Scanners heading and then pressed the Open Scanner button, the following window appeared and I was able to scan a document placed on the platen.

Next I opened Image Capture and expanded the Shared entry that showed the MP495. I selected it and was able to scan.

So my test proves that you can scan via the Printers & Scanner preference pane when the MP495 is connected via WiFi. But as shown, the networked MP495 does not create a Scan tab next to the Print tab for the networked device - which is what you see for the USB connected device as shown.

The next question is why do you not see the MP495 listed as Bonjour Scanner like I have shown in the first image. Now that I have an MP495 to play with I will try a few things to see if I can re-create your symptom.

Bonjour is working on your Mac. You have already shown the Canon MP495 appearing in the Add printer window with Bonjour shown in the Kind column. So it's not an issue with Bonjour. As for Safari, you do need to enable Bonjour in Preferences > Advanced. Then you should see it either in your Favorites bar or in Bookmarks, depending on which setting you enable. Then you will see the MP495 listed - you don't see the scanner or printer - just the device.

As for Bob's response, note that its a different model (MP560) and thus does not apply in this case.

The issue for you is why is the scanner component of your MP495 not advertising when connected to WiFi. And that's what I am trying to determine. I thought it may be due to the type of authentication being used with the router. But that has not proven to be the case.

What I do note as different between our setups is that your MP495 is shown with its Canon network address in the Add printer window (the 88:87:17 etc) for the Canon IJ Network connection. As per my image, my MP495 for the Canon IJ Network connection shows its Bonjour service name. So I think this may be a clue and I'm working on recreating the same view.