There was an updated driver too. Did you install both  driver and PS plug in? ... View more

Success. Cheers all...until the next upgrade. ... View more

Thanks for the heads up. There is also a new driver for the iPF6450. Great news. Except... now the imagePROGRAF Print Plug-In for Photoshop/Digital Photo Professional & Layout Plug-In Ver.6.00 (Mac) doesn't even load up. It hasn't been updated so all I get is: The desired imagePROGRAF Printer Driver is either not installed correctly or not installed at all. The latest version of the imagePROGRAF printer driver must be installed. So there's clearly a clash with the old Plug In and the new Driver. I can print via the standard print dialog but the plug-in is where I the functionality is and less opportunity for profile issues. Will email Canon. Thanks ... View more

I am also experiencing the same or similar at least. I am using an iPF6450 and iMac running Mojave and Photoshop 20.0.4 When I use the iPF6450 Print Plug in PS to print then as soon as I send the image to print and the image has spooled PS crashes. Every time. The printing starts and completes but I lose all the settings and tweaks I have made in the Print Plug In which is really frustrating particularly when producing prints for regular clients. I have reinstalled everything across the board many times from both Adobe and Canon. I have also submitted multiple crash reports via PS. I just tried the Legacy Comp tip and still the same. Please can you advise as sending Crash Reports via PS seems to be a pointless exercise. Thanks ... View more

Good shout. I have been suffering with this for months. Gone through every conceivable process. Then I upgraded to El Captain yesterday. And without doing anything my libraries now work. A massive relief and worth trying any Mac OSX users who haven't upgraded. So I came here to post about El Capitan and noticed the post above by reinierkorstanje about renaming the host file in the Get Info window. Out of interest I looked at my host file - which I have been trashing and checking and rechecking for months and low and behold a version was sitting there with hosts.txt in the Get Info window - along with a duplicate without. The new host file  stuck out like a sore thumb as now the file icon has a mini preview of the file ie the text and isn't just a white/blank icon/sheet. Could this have been the key all along. Either way I'm now free from this pain in the backside and can stop stewing over out of Adobe, Apple and my ISP was to blame. Have also just found out - do not trash and definitely not delete the other host file (the one without the .txt in the Get Info window). ... View more