I have a new iMac, 27", calibrated with a new i1 Display Pro. I print with an Epson 3800, mostly on Ilford GFS. When I got the iMac a couple of months ago, I reinstalled the Epson driver from scratch, downloading it from Epson Europe's site.
When I enable soft proofing in either LR or PS, it doesn't make my image look like crap. In fact, it hardly changes it at all. When I print, though, the mid-tones are muddy and the colours seem muted and desaturated, even allowing for the change from transmissive to reflective medium. I've checked the print settings and I'm not double-profiling ("Color settings" are "off" in the print dialog).
I've tried downloading the profiles from Ilford's site again, just in case they'd been corrupted, but it's made no difference. Enabling other profiles (such as for a canvas) certainly has a highly adverse effect.
I can't think what to do next. Any ideas would be very welcome.