I'm getting frustrated. I just got a new iMac with OS X Yosemite (ver. 10.10.4) and loaded Lightroom ver. 6.1.1, but my prints lack bright colors and are 'muddy'. I did not have this problem with my old Mac and Lightroom 5.-. I'm printing with an Epson Stylus Pro 3880 (driver ver. 8.64, utility ver. 9.33) and the printer and computer are using current printer/paper profiles and my monitor is calibrated. So, my computer, photo editing, and printer software are all up-to-date, but my prints look like crap. Anyone else having this problem? Thanks for any help!