Skip bone bone 10.5 10.6 is sweet! The improvements are not too visible, but the finder it has gained speed. Closing 5 seconds! It seems to me that the applications open much faster, in the case of Mail, hardly already opened clicked. I do not regret this purchase, although for the promo, I got caught a few days too late! The investment is not large compared to other platform that I will not name, who in addition, thirty six versions we do not know which to take !!! Mac user since he exists, even if it was very expensive, today there is no difference between Mac and PC and in addition I run XP Pro for a few games that are not available on Mac in short, that happiness!