Hi everyone Current set up is Macbook Air 4GB, 256GB HD with Mavericks 10.9 and iTunes 11.1.2 with Seagate Central 4TB NAS drive. Before upgrade to Mavericks / iTunes, I had run my iTunes library (100GB of songs, 220GB of movies) from the Seagate Central. Ran like a dream (odd nightmare.... but dream). Post upgrade, iTunes is SLOW - like WAY SLOW! I get the beach ball every click, it takes about 30 secs to react to clicking on a song to play, amending anything is a 1 min exercise. Adding to it is just not an option If I access the NAS drive via something else e.g. Encore or Seagate's own app or via my Samsung Smart TV, its perfect and fine. Anyone else having same issue? Or even better, a solution? I tried downgrading to iTune 11.1.1 which I was able to find from a download site, but it didn't help at all.