Hi Edmund and John, Do we know which Canon printers (if any) won't work with Mavericks? Would be great if Gutenprint worked on Canons! I know it's free and open-source, but I had no success in getting it to work on the A3 and A4 Canon printers I tried, unlike previous Epsons, where I could even print from CMYK. Sure it kind of worked, at about 100dpi and only 4-colour. I appreciate it's all done by volunteers. I'll hold off upgrading to Mavericks until I know everything works. Although I said that about every other OSX and IOS upgrade, and got burnt almost every time! Cheers Phil Phil Cruse Graphic Quality Consultancy http://www.colourphil.co.uk

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On Monday, November 25, 2013 8:06:06 AM, edmund ronald < edmundronald@gmail.com> wrote: It's the treadmill issue. Companies write the software once and then they're supposed to write it again and again.

And the print system is a little exercised part with a bunch of specialty color management code written with system calls that are proprietary and keep changing - companies get exhausted or frustrated by the treadmill and on paper Apple represents 10% of the market so the dev budget allocation is difficult to obtain and so the Mac updates lag.

You can use the Gutenprint drivers, set the driver to uncorrected, set the density so you get enough ink on paper, profile. Done.

Edmund