Why did I lose the ability to print to a networked printer? I have a Canon iP3600 printer connected to a networked hard drive and up until a few days ago I was able to print from it. however, i have now lost the ability to print ever since i downloaded Apple's updated software for the printer!

I have my mac partitioned and running Windows 7 and can still print perfectly from there, so the cables are obviously not the problem. I can still print perfectly if I connect the printer via USB directly to the Mac. I can even print a test page from the Print preferences page.

I just cannot print from a document. Print Queue keeps saying "Copying print data" but nothing happens! Have downloaded the latest driver from the Canon website and deleted and re-installed the printer several times and several ways to no avail.

Any ideas most welcome...
I had the same problem and this is what I did to fix it:


Go to http://localhost:631/

If you get the "Web Interface is Disabled" message, run cupsctl WebInterface=yes in Terminal.
Choose the Administration tab.


Click Add Printer.



If you are required to login, use a local Administrator account.
Select the printer (in my case it was automatically found).