Hi, We just got a new Fiber internet and my Air only got like 0,1 to 5 Mbit/s and when i test my sisters Macbook Air mid 2012 (My Air is mid 2012 to) Gets like 50 to 70, And i get like 70-90 when im next to our router. And when im in school and in my friends house its no problem, Gets like 100 Mbit/s and they have Fiber, but with the Apple Router and i dont, But all other computers gets like 50 in the same place where i get 0,1 to 5 Mbit/s. And i have updated all Firmwares but not to Mavericks should i update to that?