My printer has a perfect nozzle check pattern yet all my prints have suddenly become excessively printed with a magenta cast. I have carried out numerous nozzle cleans to no effect. I thought it might be a profiling problem so have printed the same image using different profiles but they all come out the same. I have recently upgraded to Photoshop CC 2015 and also gone from OS X Mavericks to El Capitan on my I Mac 27. I have also reloaded / updated the driver for this printer again with no improvement. I use a continuous ink system that has performed perfectly for some years. Having felt that I have covered all the bases can anybody suggest where to go next.