new macbook pro 2011 weak and dropping wireless connection

I did it manually (with right permissions) and just checked with Kext helper b7.

No luck either way.

After installing the extension, tried to manually load it with kextload command and got this into system log:

May 2 17:59:19 macbook kernel[0]: kxld[com.apple.iokit.IO80211Family]: The super class vtable '__ZTV20IOEthernetController' for vtable '__ZTV17IO80211Controller' is out of date. Make sure your kext has been built against the correct headers.

May 2 17:59:19 macbook kernel[0]: Can't load kext com.apple.iokit.IO80211Family - link failed.

May 2 17:59:19 macbook kernel[0]: Failed to load executable for kext com.apple.iokit.IO80211Family.

May 2 17:59:19 macbook kernel[0]: Kext com.apple.iokit.IO80211Family failed to load (0xdc008016).

May 2 17:59:19 macbook kernel[0]: Failed to load kext com.apple.iokit.IO80211Family (error 0xdc008016).

It seems there are dependencies between libraries.

Could somebody link IONetworkingFamily extension from Lion just to test?

I uploaded the ionetworkingfamily kext http://www.kexts.com/downloads.php?do=file&id=1161

If that doesn't work you may consider just copying the updated broadcom plugins from the io80211 kext into your regular 10.6.7 io8011 kext (and leaving the 10.6.7 ionetworking family kext stock).

Good Luck!

I was experiencing the exact same symptoms. I called Apple support. The guy had a fix for me: apparently Apple has dropped support for the WEP password protocol for wireless networks. Both the networks I was trying to connect to had WEP passwords. This is what he had me do:

Went to Keychain Access > Preferences > Reset Default Keychain

Then restarted, connected to the network.

Added $ before the password (which was all numbers).

After this, it connected like magic and has been working for four days! Hope this helps.

Keeping the old files with the new plugins doesn't work, tried that already ;-)

Installed the two kexts IONet and IO802 and doesn't work either.

I will try playing with version numbers inside plists to see if it helps.

wont let me add $ before my p/w, just comes up saying "this network requires as WEP password

Hi!

I do have the same problem, with my MBP 13 (8.1). It's 2 day old and I have a bug! It was working super until batery power down... now won't connect to ANY WIRELESS, mine is an aiport extrem (7.5.2). I own an older MBP (1.1) work perfect! I change all possible setting of the airport, nothing work for the new laptop! Hope to have ra response from Apple soon! I will try to reset the 2 tings talked in this thread, but ****, it'S brand new, don'T feell like reset a 2 day old computer...

Thx!

Mr Uneasy

I just wanted to post a quick update, following my post of a few days ago when I mentioned I'd been to my local Apple Store and all MBP's in there had erratic pings.

Whilst I was there, the only thing that one of the Genius' suggested I do (before starting to order in new wireless cards etc) was remove all of my existing network configuration/settings. I had already manually removed the Airport from my network setttings and re-added it, numerous times, to no avail. However, he removed an entire folder from somewhere. I'm a MacOS newbie so I'm not sure exactly where it was he did this, I just saw him go to a certain path in Finder, deleted a configuration folder, which rendered my network settings entirely empty when he opened them up. He then re-recreated my 'Location' (as automatic), at which point all the standard items were added (Airport, Ethernet etc.). He applied that, and sent me on my way. Now I'm still not 100% convinced that this really achieved anything - certainly not in terms of the erratic pings as they remain, however, since that trip to the store on Sunday, I've probably been using wireless back at home for at least 10+ hours and so far, I've not noticed the wireless drop at all! This could just be total coincedence, but I was previously getting drops anywhere from once every 20 mins (this only occurred a couple of times) to once every few hours (more typical). I'm still half waiting for it to start dropping again, but so far, so good.

I'll continue to post any updates on my situation over the next week or two.

You can`t streaming even when you have strong wifi connection? How much is RSSI at that moment?

Hi Lara,

I hadn't tried streaming, so this evening I've been streaming some 720p (5gb) videos via wireless. I let one run for 20 mins and I had no interruptions or stuttering etc. I then tried another 3gb video file and have been using the slider bar (VLC player) to skip forwards and backwards, to give it something to think about, and its been keeping up fine. So far, so good... though why it's suddenly behaving itself I really don't understand - still, I'm not complaining...

apple take care of us... we must work and need a functional wireless for 1.200,00 €!

I guess I will add my name to the list of people having problems. Sigh. I am also a 1st year law student, so this is more than a little annoying.

http://forums.macrumors.com/showthread.php?t=1147911

The official apple page for this update (linked in first post on the macrumors thread) doesn't mention WiFi issues being fixed, however if you note the fourth comment from user Nermal on, it seems to have helped him. Have yet to go home from work so can't confirm if this is true or not but my fingers are well and truly crossed!