Greetings Pahu et al. I have the same problem: OS 10.6.8 won't print wirelessly to Canon MP568 suddenly (was working fine, now can't 'see' the printer)
I have tried what you and others recommend above, but all my Macs (one iMac and 2 macboks) seem to have lost the ability to print to my Canon MP560 series, which were all printing happily a few days ago, while my PC continues to print fine.
Seems to be a communication error. The printer first showed as idle though it was printing fine from the PC at the time. Then when I remove it from the list of available wifi printers in the print dialogue box (Sytem Prefs --> Print and Fax), it does not re-appear when I click oon add printers. Strangely, I can ping it from the iMac so they are 'connected' via the router...
Everything is connected wirelessly and I do not share/use a mac as a network printer; everything is connected directly to the router, including the MP.
The only thing that has happened in the past week or so is that Mac support re-installed iTunes on the iMac as it was not syncing with any of iTouches (conflicting error messages, one iTouch froze and said it wouldn't unlock for 46 years haha). But I am assured nothing chnged the internet / printer protocols.
So... This is what I have and what I have tried.
Printer:
- Canon MP560 series
- IP address 192.168.1.8 (from printer LAN info and pinging from iMac)
- Subnet mask 255.255.255.0
- Default gateway 192.168.1.254
- LPR protocol is 'enabled'
- Bonjour is 'enabled'
- Bonjour LPR service is 'disabled'
- Have rebooted after unplugging
- Have accessed its internal web page of the MP (network configuration) via the iMac's browser. I can see under advanced network settings that it is connected to the correct router, uses WPA2 same as the iMac, uses IPv4 same as the iMac, and the IP address, subnet mask and router IP are all the same as the iMac (automatically collected)
Router:
- Billion (supplied by aussie telco)
- Also rebooted
- IP address 192.168.1.254 (double checked by pinging from two machines)
- Has been working fine for a couple of months
iMac
- OS X 10.6.8
- software updated and rebooted
- Airport working fine, no probs accessing internet, same with all mac devices in the house
- Ran network utility. Shows hardware (airport) address: d8:30:62:62:a4:eb
- IP address 192.168.1.11
- Link status is active
- Successfully pings the MP, Router and iMac using their IP addresses above
- Was printing wirelessly to the MP until 2 days ago, no settings have been changed
PC
- Dell Latitude
- Printing wirelessly to the MP, no problems
Where to go next?
Thanks.