Hello there, I am hesitating in buying a new macbook pro because in part, of all the problems reported here from a yellow screen to sluggish UI performances etc. My last macbook pro had a yellow tint problem and I dealt with it thinking the new one would be better but now, I don't want to deal with this kind of problem. Also, people who work @ apple in terms of software development and stuff can't test a macbook pro? I mean, it's pretty obvious that Mavericks hasn't done all the necessary to optimize itself to handle retina display screens. What is apple waiting for? Broadwell? I'm pretty pissed a $400 computer doesn't lag that much. If Apple wants to release super hidef screens, fine, but make sure it doesn't diminish user's experience. What are your thoughts? Lag fixed in 10.9.1? or only 10.10 or never?