Hey, Maybe someone lurking around this forum has already red my former post, which explained a lot of the problems I'm having. Ever since I received my 13" rMBP back from the repair it is very slow on startups. Until I first see the Apple logo roughly 1 min passes. Usually it was done booting in like 20 sec. Also every custom wallpaper I set up is gone after I restart my MacBook. Does anybody know what is wrong? I don't want to turn it in yet a third time.