Hey guys, I have a (almost) maxed out Retina iMac: 4 Ghz, 24 gig ram, m295x. I use Lightroom 5.6 for my photos and unfortunately the Library view is terribly slow and stutters all the time while browsing. As soon as I move the window to my old Cinema Display, connected to the iMac, the stuttering goes away. it seems to be a graphic problem. Same happens if I resizes the LR window to a smaller size on the Retina screen. Anybody else has those issues? Is it a LR problem or is the iMac too slow for rendering it on the retina screen?