To scan with Image Capture and Preview you need to install the ICA driver. The other scanner driver you probably downloaded is just for MP Navigator.
If you did download and instal the ICA driver, do you have a Scan tab in Print & Scan next to the MX892 Print tab? And if you do and select it, does it show a Scanner window or do you get an error message?
Could you post a screen grab of what you see?
Hi..I am having the same issue as WEBNICB. I had been using the CanonMX892 with my macbook pro using Lion but got the new retina display macbook pro with v. 10.8.2 and now it is not working! I will go and download the ICA file you mentioned and when I get to my office in the morning see if that solved my issue!
I figured out how to make it work by going back to the product page (http://www.usa.canon.com/cusa/support/consumer/printers_multifunction/pixma_mx_s eries/pixma_mx892#DriversAndSoftware) and downloading the MP Navigator EX Ver. 5.1.0.
You have to choose your OS and version. Then the MP Navigator is located in the Software menu.
Once I downloaded this program, I was eventually able to set it up and scan from it.
But still no option to scan from the menu in the Preview program.