I have a Canon PIXMA MG5500 and a MacBook Pro with OS X 10.10.3
The printer and scanner are supposed to be wireless and I have no problems with the printer but when I try to use the scanner it just won't cooperate.
I have tried everything. I've uninstalled the drivers and reinstalled them, I've tried looking for answers in the manual and nothing.
When you want to scan something the scanner says I need to set my computer to scan. When I do that my computer can't find the scanner even though the connection is fine and sometimes it asks me to connect it with a USB cable which I don't have and it didn't follow the printer.
Those TWAIN errors are not logging now either. Life is good again in Lion scan land.
Best Answer
The packaging for the Pixma printers is misleading. It's a wireless printer, but for scanning, you need to either tether to your computer, or plug a USB drive into the printer. When conducting the scan, you'll be prompted to choose the USB drive, and after scans are complete, you can walk the USB to your computer.