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sirhyll Author

Level 1

0 points

BUG: Mountain Lion kills wifi speed when using airplay or time capsule

Hi,

Here is the situation, I have a MBP 3,1 Core 2 Duo 2,4Ghz.

I've upgraded from 10.7 to 10.8, and now, when I'm trying to use time machine on my time capsule (last gen), or airplay on my airport express (802.11n) the transmission speed drops from 160/200 to 6/13. (As you can see on the screenshots below. First image, without any of these two features / Second image, with time machine trying to find the time capsule drive / Third image, with airplay activate)

The time machine don't manage to find the time capsule drive and failed.

Airplay works for 3 seconds and stops. I've tryed airplay with itunes (the old way) and quicktime with the new airplay option, both stops after 3/4 seconds..

I made my 30Go time machine backup with an ethernet cable, it worked ok.

I still use my airport express with my iPhone without any problem.

And all other internet usages are working correctly, I can even acces to my data on the time capsule and copy files from with no problem, without this "transmission speed drop" situation.

I have 3 differents wifi signals in my (large) flat:

The time capsule broadcasts 2 different wi-fi n on 2,4ghz and 5ghz

and another Asus router broadcasts wi-fi b/g on 2.4ghz

I've tried the 3 different connections, all have the same "transmission speed drop" issue with airplay and time machine, and these two features don't work anymore.

And of course, I never had this situation with Lion..

Any solution, or is there definitely a bug with mountain lion handling my wi-fi card: AirPort Extreme (0x168C, 0x87)

I already reseted the PRAM and NVRAM; and did an onyx maintenance nothing changed...

Any help appreciate,

Thx

Posted on Jul 29, 2012 11:15 AM

152 replies

Jun 26, 2013 11:36 AM in response to lenn4rd

At least we've ruled out non-Apple kextstat. Some more things to try if you're willing to experiment.

1) Downgrade the kext to the 10.6.8 version posted earlier in the thread. Be sure to confirm that it was propely installed. If that doesn't work,

2) Create a new temporary wifi profile (new SSID and a different encryption protocol) on your router and test it for wifi drops.

3) If that fails, delete all the saved wifi entries in System Preferences > Network along with any wifi entries in Keychain Access. Reconnect and test.

Sep 13, 2013 7:07 AM in response to sirhyll

Has anyone taken 10.8.5 and does it have the same issues as before?

Sep 13, 2013 11:36 AM in response to MacMunfordGB

Given that the kext version number for 10.8.5 is still 5.3, the same as it was in 10.8.4, I'm going to assume that nothing has changed.

lenn4rd

Level 1

4 points

Sep 13, 2013 12:44 PM in response to Gunny Sack

That's right, I have the same issues as before.

Tag986

Level 1

0 points

Sep 13, 2013 3:21 PM in response to sirhyll

Same problem for me since I have 10.8 ..
Today I take 10.8.5 and it's the same 😟

Airplay could be killed cause this connection is not stable !
I hoped a solution but ... Nothing ...

sirhyll Author

Level 1

0 points

Sep 16, 2013 1:10 PM in response to Tag986

Yep, same problem again and again.

Hope it will be fixed on 10.9... maybe...

I had to switch the airportd file, once again, to get it work ok

Tag986

Level 1

0 points

Sep 16, 2013 2:01 PM in response to sirhyll

Sorry for my inconvenience but I don't know how I can set it te replace the "airportd" file

Can you help me how to process.

Sep 16, 2013 2:06 PM in response to Tag986

The instructions and the airportd file are on the previous page.

Tag986

Level 1

0 points

Sep 16, 2013 2:37 PM in response to Gunny Sack

Thks Gunny Sack for the answer, but when I try this file my Wifi could not be connected to any device.
I applied like it was described in the previous page.

Sep 16, 2013 2:44 PM in response to Tag986

Did you restart? If so, check the version numbers of the kext installed in /System/Library/Extensions. Sometimes the kext utility doesn't properly install the kext.

Yorick2a

Level 1

35 points

Sep 17, 2013 7:09 AM in response to Tag986

So looks like i await till i hear how X.9 works then if that still does not work then I will go through changing the file out. I have been hesitant in doing as i realy on this MBP for work and can not be tired up reduing the OS atm. So OS X.9 is compatable with the Mid 2007 2.4ghz MBP? I would have though for sure this one would not get another update!!! Hope they fix the wifi issue if this is true.

Tag986

Level 1

0 points

Sep 17, 2013 10:07 AM in response to Gunny Sack

So, next to my famous problem. I do not apply correctly the kext replacement. Just the "airportd" file and the kext utility without change the 10.6.8 or 1.07.3 it in the system.. (big mistake sorry)

Good news for today. My connection seems to be better than orignial 10.8.X versions !

Thanks a lot to resolve this problem while Apple do nothing for M.L

oli@mac

Level 1

0 points

Sep 19, 2013 12:20 AM in response to sirhyll

Can't believe this is not fixed, again. A tad disappointing...

Yorick2a

Level 1

35 points

Oct 22, 2013 1:18 PM in response to Gunny Sack

did anyone try OS X.9 yet? not updating till i hear if it works or not

by the way OS X.9 is free

briellie

Level 1

0 points

Oct 22, 2013 1:34 PM in response to Yorick2a

10.9 does appear to fix the problem from initial tests on a 2007 MacBook Pro. Haven't been able to test on mine yet since the download is taking forever (yay for millions updating all at once). I'll post back once I find out details.

The fix I provided has a nasty side effect that only people who use WPA/WPA2 Enterprise will have an issue with. You can't properly use 802.1x with wifi anymore due to changes in the security stuff which we run up against by swapping out the kext and the airportd file.

Partly why I have been quiet about my fix lately was due to me having to go back to 10.6 on my primary laptop, because *drumroll* I need to connect to wifi networks that use 802.1x. AFAIK though, my fix still works on 10.8.5.

BUG: Mountain Lion kills wifi speed when using airplay or time capsule