i had the same problem with my macbook air I bought last August.
At home it would drop the connection or gets incredibly slow while my PCs and mobile devices (iphone, android phone, ipad, android tablet) are working just fine.
But a call to the tech dept. at my broadband carrier (Virginmedia UK) solved the problem.
The guy said that the problem is the interference my macbook is getting in the environment and suggested to change the broadcast channel on my router settings.
I logged in to my router setting through my browser (when you do this, you want to connect to router through a wire, because wireless connection may get dropped during the setting and then it's a bad news)
Originally my channel was set to auto, but the tech guy said I should test from 1 and see if the problem goes away and if not then move on the 2...etc.
I set it to 1 and the problem is gone!
I don't if this is The solution but sure it would be for some people.
I have a similar but not identical problems. I have a mid 2011 MBA. Mine has no problems what so ever connecting to networks but it gets a really slow connection (on some networks) whilst connected. All networks work fine for windows/linux laptops and cellphones.
It just seems so random, some networks always work while some rarely do.
If "the network is the problem" then how come so many other OSs and devices have no problems while the MBA do?
I really wasn't expecting to have som many problems on a mac laptop.
If we are this many experiencing a problem, probably something is wrong.
I posted my problem last week (lost connection and the router was not visible anymore on my new macbook air). I seemed to have solved it in the same way picple describes. I downloaded an app on my ipad and saw that when pinging to the router, somehow there was a disturbance in the pings. When i changed the wifi channel on the router (chose one that was not much used in my neighbourhood, which also can be figured out with an app) it works fine now. Cross my fingers that it keeps working, but havent had the problem since a few days now (and had it non stop before)
Thank you for the "solution" or workaround rather but this is not something to be expected of a quite expensive product is it?
If all your other computers/devices work on all networks but the MBA only works on some then it really isn't a network problem - it's a MBA problem.
This is absolutetly crushing for me. My MBA works at home and at the university I attend but I've experienced this problem while staying at my mothers and visiting friends. I'm not going to reconfigure everyone I knows router just to use my computer.
I just feel it's bad when a company with as expensive products and big profit margains as apple can't figure out how to solve a problem for one of their devices core uses. You don't use your MBA as a desktop, you use it on the go so the WIFI has to work.
Found out that mine only did it after being on stand-by.
This solved it!
After a Java update it started to f*** up.
I corrected the problem by going to the Apps>Utilities>Disk Utility> Choose your HD and click on "First Aid" at the top. Then click "Verify Disk Permissions" Let it run (about 10 min on my 500gb but it will initially tell you many hours). After that is complete run "Repair Disk Permissions." After that it was good!
Its great that some of you found a solution by tweaking the router. But I have 5 other iOS devices connected to the same network and only the MBA has connectivity issues. It has to be soemthign wrong with MBA and not the router. I wanted to use it for business travel, I cannot afford not to have network conenctivity when I am at work. For over 1000 dollars, this should be able ot handle simple Wifi properly. If its not, then its a POS and has no use for me.
On my home wifi network everything works fine except the macbook air 11". The internet speed was much lower with lot of stop and disconnection. I did not know it was the weak wifi receiver in the macbook air and I bought a second Airport Express just to strengthen the signal for the flat. It looks like the Macbook Air wifi antenna is simply too weak as it has been said before. Bluetooth might make the case worse but it does not change anything. It seems to be a hardware design problem. It is simply just weak and I have to connect it to an ethernet cable if I want to have a fast and reliable connection. Quite disappointing.
I have 3 MacBook Airs and all had this f@@@@g problem :(
I had a netgear and linksys router and still problems.
Then I thought to myself, Apple are so secretive they don't test these things outside of there own building.
So... I purchased an Airport Extreme and hey presto the MacBook Air now works perfectly fine.
One thing to note is when my washing machine is on it doesn't work, probably interference.
Also change your MTU to 1300 which is the same as a VPN connection..
This has caused me no end of trouble and heartache....
Hope this helps....
see, i think the really alarming/annoying/outrageous thing about all of this is that (months or possibly years after this has first been raised)
a) nobody has come up with a genuine solution (neither forum members nor apple themselves; i am not sure apple even acknowledge the existence of the isue); and
b) by buying an apple product we now seem to reach the point where you not only buy into a closed software eco-system ("itunes and the likes") but effectively it seems that one is buying into a closed hardware system as well (as in the 'solution' to the problem is to bin your fully-functional, industry-standard router which works for every other piece of kit on the planet and replace it with an OEM apple variant. this obviously still doesn't allow you to connect to the starbucks network around the corner from the apple shop where you have just wasted $$$ to make your shiny new 'air' work at home. you will also still feel odd carrying the ethernet adapter - which cost you an extra 35 bucks - to university and hiding it from your fellow students as you won't be able to log on to the uni wifi network...).
actually, i am wrong, the fact that my iphone 5 doesn't dongle with my brand new macbook air implies that the wonderful new reality that apple presents us with doesn't quite work flawlessly internally yet...
I have a MBA, it is 1 month and 2 weeks "OLD" and nobody wants to exchange it, of course.... So. When I wanted to buy a new laptop for my job, everybody said: you need an Apple, it is the BEST, it never has a problem, etc... My problem is same like everybody who is here. I am learn your language now so my english is terrible yet... sorry about that. That is why I would like to ask... could somebody start a petition for this solution.... http://epetitions.direct.gov.uk/petitions/check
Maybe we can "win" a little attention ... Or it is doesn't matter? what do you think?!
Well shoot, I was planning on ordering a MacBook Air and have been researching to figure out how I want it configured. I have had an iPad for about a year now and just love it, have had 0 problems with it. So when my old windows (vista) laptop died, I started thinking I wanted a Mac vs windows 8. I sure don't want to buy a white elephant tho, is this wifi problem hit or miss, a sure thing or does it depend on your ISP provider hardware? I'm not very technical so hope this isn't a dumb question.