Question: I have a Cannon MP560 that kept having communications errors. One of the suggestions I read was to remove the printer from the print & scan menu and re-add it. Once I did that the scanner disappeared as well and I cannot get OSX 10.7 to recognize this device as a scanner again. 

* Does anybody know how I can get OSX to recognize this device as a scanner again?

Here are some screenshots of my print & scan screen and my add printer dialogue. Bonjour does not show me any information about this device either. 

![enter image description here](https://i.stack.imgur.com/fX8Ad.png)

![enter image description here](https://i.stack.imgur.com/Jgfpy.png)

Answer: 
After updating my Mac to Yosemite, my Canon MX350 wouldn't scan. 
Type in
www.usa.canon.com/cusa/support/consumer
You'll be on Get Product Support. 
Type in your model (eg. PIXMA MX350) click Go. 
You should see Operating System Yosemite (detected). 
Look for the series Scanner Driver Ver. and click Select. 
Then you'll see Download and click that and go through the download "motions.
Restart the computer and your scanner should be working great. I just clicked on the icon MP Navigator EX in my dock and viola, it was all there.
This is how I fixed mine after spending hours watching videos and reading so many suggestions. I just did this and actually figured it out myself.
Hope this can help others!!
Cheers!
New Scanning Instructions:

Canon MP560 to Mac Computer with OS X Yosemite

(Use USB cable to port)

Go to system Preference

Printer/Scanner Icon

Hit open scanner

Hit scan button and open MP Navigator

Default printer last printer used (MP560)
(Use USB cable to port and indicates on line)

Hit scan

Do selection as needed/required

I set the scan to go desktop to see immediately