Just bought the new Retina Macbook Pro 13" i-7 256Gig (2015). UI lag is apparent, when opening Unity3d, there is extensive UI lag. UI lag is only visible for graphic extensive items, initial loads, and rendering. Anyone else having this issue? It can run Unity 3d. Rendering is fuzzy at first, until scroll over the text, then it is unfuzzy, a bit. It Can run Autodesk maya, rendering is fuzzy until scroll over, but happens each time. I flashed the ram and did a P, R, Option, command restart = no change, still fuzzy when opening those two applications. UI lag in launchpad not a issue. All other functionality is smooth minus UI lag and fuzzy graphic areas. So, all in all, this laptop is GREAT for programming/web development on - if that's what you are using it for, no issues from a working professional developer/artist/design perspective. For game programming, maybe the 15" with the dedicated graphics card maybe better until next graphics update. Everyone else: you're getting something too overpowered for day to day.