Hi,
Canon took me through the basics of all the steps I had been through before, including how to confirm the printer was finding my WLAN. Then they said
1. Go into System preferences -> Printers and Scanners / Print & Fax.
2. Should your printer be listed there already, remove it by clicking on the printer to highlight it and select the ‘-‘ button.
3. Click on the “+” button to add a printer and select ‘Add a printer or scanner”
4. Another window will then open, which may be populated with Apple’s Bonjour printer. Do not select this printer but rather wait a few moments and another printer will appear, which has “IJ Network” in its title. Select this printer and click on Add.
• If the IJ Network printer does not appear, close down all open programs and restart your Mac. Once the Mac has been restarted repeat the process of attempting to add the printer.
So I have done. I have wireless printing which seems stable and repeatable. I have one remaining fault that I am waiting for Canon to advise me on.I used to be able to print a brochure double sided. What I mean is I started with a 4 A4 page document on screen, in Open Office or Adobe Reader (.pdf) and then asked for a brochure which gave me an A5 booklet printed both sides. BUT now when I try printing a brochure and asking for duplex printing the printer always uses separate sheets of paper for each side. Most annoying. And i cannot see what else to do.