I have a MacBook Pro running OS X 10.6.8. working wirelessly with a Canon PIXMA MP990 Series Scanner/Printer (which is also shared with our PC). My problem is that when I go print from Photoshop I cannot access the color and other ‘fine-tuning’ print dialog boxes wirelessly. Mac says something about ‘printing to a non-postscript printer’, and I have to fire up the ancient PC!! What a pain! Downloading updates doesn’t seem to help. Can anyone help me?