Hi, i have noticed this annoyance since day one i bought my rMBP (last year), used resolutions: best for retina, even the scaled ones. from mountain lion to mavericks with latest 10.9.2. (model in signature). No smc reset or pram reset fixes the job. Does this occur to you guys? Side note: I am so close at selling this machine as all of my forum post from here to apple's forum is mostly about lag. Bums me out at work. Even using graphic intensive apps, not games. 3d rendering apps, photogaphy apps, videography apps, drawing apps, Lag. Is OSX to blame? Any workaround on resolution changes without sacrificing much on performance and screen quality?