Q: WiFi Issues With MacBook Air

i can confirm that verify/repair Keychain with Keychain Access Utility solved all wi-fi problems on

3 MBA here in my office.

During verify task i noticed two permission errors in com.apple.security.plist, so i launched repair

and permission errors gone.

thanks to crbtaylor who find for first a solution (for my problems) on this thread...

works for me too

thanks!

Okay here's my fix -- I'd done all the earlier fixes for my Macbook Pro and I've had no improvement in Wi-Fi connection; my Wi-Fi is (was) intermittent and when connected, very slow -- losing packets like crazy. Here is my solution for you all to try to turn your slow machines into fast internet rippers! To start, I am not a computer expert. I just finally luckily found the answer after a hundred of wasted hours of research and tech support from Charter cable and Apple. My solution is the wireless router itself. I had done all the prior mentioned adjustments and found no relief. What did it for me is going into my Charter Netgear router and unactivating the IP FLOOD DETECTION. To quote someone much more knowledgable then me, "IP Flood Detection is a type of Denial of Service attack whereby the victim or system is flooded with information, using up all available bandwith thereby preventing legitimate users from access." I had to log onto my WI-Fi router and then use navigate to a special page to find this feature.

http://community.charter.com/t5/Speed-and-Connectivity/Intermittent-internet-pro blem-for-4-months/td-p/4372

If this does fix your problem, feel free to send me a new iPad as a token of your thankfulness.

Useless workaround. we are talking about a ultra portable netbook. this solution is useless since you will not always be at your house. Remember, you don't have access to routers in public.

Differently of the first post of this thread, I have problems with wi-fi "n".

I just bought a Time Capsule (2T) yesterday and a Mac Book Air last week (11.6", 128 SSD, 4GB RAM, OS X Lion 10.7.2). I also have an old Mac Book White (2009, OS X Snow Leopard).

I bought Time Capsule to change my old router. Time Capsule works fine with "n" wi-fi.

When I'm near Time Capsule (TC), both computers shows the same results (very high speeds).

However, when I leave the room where TC is, in certain points of the house, the old Mac Book White shows velocities ten times faster than the new Mac Book Air.

In both machines, bluetooth is always off.

I'm really very disappointed with Apple.

Count me in as a 2011 13" Air user who is having wifi issues. I can't connect to my 5ghz network all the time and when it does, it's very unreliable. The MacBook Air has no problems connecting to my 2.4ghz network but it's also strangely slow at times with unresponsive Internet. The Internet will just take a dive for a few seconds and then resume. I have ZERO issues on my 17" MacBook Pro with this wifi network so Apple has no excuse for this.

Someone with some time on their hands should gather all this info and put it together in a manner where we can make some proper noise. I'm not sure these large threads always make their way to Apple, especially since WiFi is finnicky in general but the evidence is clear that there is issues with the hardware/software related to MacBook Air. It's very clear in this thread as there are many cases where I see similar issues.

I really don't want to go back to my 17" as daily use but if something doesn't clear up in the next 15 days I'm probably going to have to return this.

EDIT: I have issues even with bluetooth turned off.

I am having the reconnect issues with both my 13" and 11" MacBook Air i5. I was able to narrow this down to some kind of a conflict with the bluetooth; if I turn off my bluetooth, the poblem goes away...

Here's an update...

My girlfriend also has a MacBook Air... her bluetooth is turned on and was near me and noticed that my Internet was much slower. I asked her to turn it off and my slow Internet issues disappeared and has been going strong for awhile now. If you guys are using this in cafes or public spots with lots of devices you might be experience bluetooth interference. At first I was thinking it was only related to my bluetooth internally but it looks like it's affected by external sources as well.

Please try this, turn off all bluetooth devices around you and see if your experience is better. I still cannot connect to my 5ghz band wifi.

I'm not saying this is a solution, just an update to my experience with bluetooth and it's affect on the MBA wifi.

I think Apple is going to have to own up and do some type of mass recall/replacement on these devices at some point.

128,000 views+ and counting on this thread, and not a single legitimate solution offered by Apple directly, not even acknowledging the issue.

At least Steve Jobs acknowledged the iPhone 4 owners to go screw themselves ("just dont hold the iPhone like that") before admitting to antennagate, and then offering cases in response.

This new Apple policy of silent treatment is just bad. I can see it now - Tim Cook: "Let's just ignore them...and hope they buy the next MacBook Air with the retina display instead."

10.7.3 just came out.  The description includees "Resolve a Wi-Fi connection issue when waking from sleep."  Crossing my fingers while I download, and looking forward to a seamless wake when I get home.

Just installed 10.7.3. Browsed a few sites, answered an email. Put my MBA 13" 2011 model to sleep for a couple of minutes. Upon opening the lid, no connection, and did not recognize my network. This after installing the Airport Utility update and installing new firmware.

Very disappointed

I just installed 10.7.3. I can confirm that it works for me. I always had a reconnection problem after waking up from sleep. I always had to reconnect manually. Now it works fine.

I had issues with my wifi not working. I got the wifi card in the mac air replaced by Apple at no cost and its been working fine for over a month. I am very happy with the mac air now

Can't wait until I get home tonight to see if 10.7.3 fixes my MBA 13" 2011 issues too.

The major problem I am having (in addition to the wi-fi starting in a disconnected state on wakeup), is that periodically I can be browsing sites and I get a 'server not found' error page in Firefox. This happens very frequently, maybe 3-4 times during every hour of browsing.

I try pinging that domain and it fails, however, pinging it from my Windows machine (on the same wi-fi network) or browsing to it on my iPhone (also on wi-fi) works fine. Therefore, I know it cannot be a DNS issue. I have tried refreshing that site multiple times, flushing my DNS, even clearing my browser cache with no luck. Whilst this site is 'down' I can visit other sites.

The only fix seems to be recycling the wi-fi connection on the Macbook Air. Afterwards, the site loads perfectly fine. As you can imagine this is highly annoying because I can never be entirely sure if the site is genuinely down or if it's my MBA's wi-fi. Can anyone else report similar issues?

Apple, I hope 10.7.3 fixes these wi-fi issues!

After 10.7.2 and this link, i got working wi-fi.

But 10.7.3 ruined all again. My wi-fi drops few times during every hour.

How can i downgrade to 10.7.2 without harm?