Hi all, First of all, I tried and tried, but, for the life of me, I couldn't find any topic dealing specifically with my problem. I am struggling to find a solution to an extremely annoying issue. A couple of weeks ago connecting to the Internet with my Macbook Pro from my room via WiFi has started becoming an increasingly challenging task. Nothing as changed as far as the layout of the house or the router location are concerned, nor have I positioned metal objects or anything that could potentially create an interference close to the router or elsewhere. Basically, nothing has changed but my Macbook's ability to seamlessly connect to the WiFi network. In some cases, the connection drops and I have time out errors, but mostly it appears to be a matter of the connection being extremely slow see images below. What is more, my girlfriend can access the network with no effort using her 2010 (or 2011) white Macbook. My iPhone 4 is connected as well, although the signal it picks up is not as strong as with the Macbook Pro. I am under the impression that something might be wrong either with Mountain Lion handling of WiFi connectivity or with my Macbook's Airport card. Of course I haven't the faintest idea how to diagnose whichever issue I might have. The things I am sure about are the following: Extremely low transmit rate, even when the RSSI is not so low as to justify such a consequence. In this particular case, my girlfriend's white Macbook is getting a marginally stronger RSSI (-68), but the transmit rate ("Velocità di trasmissione in the Italian menu pictured below) ranges from 24 to 54, the latter being the maximum speed of which my router is capable of. The very orientation of the computer seems to affect the connection, that is to say, the Macbook seems to pick up a better signal when the router is on its left rather than on its right as silly as it may sound; I do have a WiFi extender, but it never caused any problem and does not appear to be the cause of the issues mentioned above; My Macbook's capability to connect to this particular WiFi network seems to have worsened and diminished. I have been connecting to other wireless networks during the last few days, but always in environments I was not used to and any comparison is therefore of little or no consequence. Now, I have been reading everywhere that Mountain Lion has several issues concerning WiFi, but in fact I have been a happy camper since I upgraded from Lion the very same day it came out. I wonder if something could have happened hardware-wise: Frankly, I have no idea whether it is even possible for a wireless interface to fail with so trifling and only exhibit such subtle symptoms that one has to carefully alt-click the WiFi menubar icon to realise about the failure... I do carry my Macbook Pro in a backpack everyday, but I have never smahed it onto something, nor has it ever fallen. I find it difficult to believe that something could have gone wrong inside its guts. I am given to understand that the antenna is in the hinge/display assembly, so replacing it could potentially be a problem. Now, can someone please help me shed some light on the issue? Thank you very much!