sirhyll
Level 1 (4 points)

Q: 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..

 

1.jpg3.jpg2.jpg

 

 

 

 

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 11:25 AM

by rJUUSO,Solvedanswer
rJUUSO rJUUSO
Level 1 (10 points)
A:

The wait is over! 10.9 Mavericks solved the slow transmit rate problem on my 2007 MBP.

Posted on Oct 26, 2013 8:14 AM

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

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  • by MacMunfordGB,

    MacMunfordGB MacMunfordGB Jun 5, 2013 4:28 PM in response to Gunny Sack
    Level 1 (0 points)
    Jun 5, 2013 4:28 PM in response to Gunny Sack

    Well, I have WiFi back now.  The applications function with the airportd and the 10.7.3 kext set.  I still have the low transmit rate though, same symptoms .. stopping and starting the WiFi helps for the back up.  Did I miss a step?

  • by Gunny Sack,

    Gunny Sack Gunny Sack Jun 5, 2013 4:33 PM in response to MacMunfordGB
    Level 1 (40 points)
    Jun 5, 2013 4:33 PM in response to MacMunfordGB

    Confirm the version # of the kext installed in /System/Library/Extensions. In the past, I've had the kext installer silently fail when installing a kext.

  • by MacMunfordGB,

    MacMunfordGB MacMunfordGB Jun 5, 2013 4:47 PM in response to Gunny Sack
    Level 1 (0 points)
    Jun 5, 2013 4:47 PM in response to Gunny Sack

    That was it.  It wasn't removing / backing up the old (um new) one to install the 4.2.1

  • by KaitainCPS,

    KaitainCPS KaitainCPS Jun 6, 2013 9:09 AM in response to Gunny Sack
    Level 1 (0 points)
    Jun 6, 2013 9:09 AM in response to Gunny Sack

    So what's the evaluation after several days with the new version and the rejigged patching strategy? Does everything seem to be working okay? (I've held off from updating so far.)

  • by briellie,

    briellie briellie Jun 6, 2013 9:43 AM in response to KaitainCPS
    Level 1 (0 points)
    Jun 6, 2013 9:43 AM in response to KaitainCPS

    With the kext and airportd swap, everything seems to be working okay for me. 

  • by MacMunfordGB,

    MacMunfordGB MacMunfordGB Jun 6, 2013 10:49 AM in response to briellie
    Level 1 (0 points)
    Jun 6, 2013 10:49 AM in response to briellie

    After applying Briellie's fix of the airportd and the retro 4.2.1 kext's, I found that rebooting and clearing my caches has resolved the issues.

  • by Nathan Goldshlag,

    Nathan Goldshlag Nathan Goldshlag Jun 6, 2013 11:45 AM in response to briellie
    Level 1 (100 points)
    Jun 6, 2013 11:45 AM in response to briellie

    briellie,

     

    What is the kext swap and how do you get it?  I have the airportd one.

     

    Nate

  • by briellie,

    briellie briellie Jun 6, 2013 11:54 AM in response to Nathan Goldshlag
    Level 1 (0 points)
    Jun 6, 2013 11:54 AM in response to Nathan Goldshlag

    Here is a zip file with the 10.6.8, 10.7.3, airportd, and kext utility.  Back up the existing kext, drag the replacement one you want to use and drop it on the kext util and it will automatically install it.

  • by KaitainCPS,

    KaitainCPS KaitainCPS Jun 6, 2013 12:51 PM in response to briellie
    Level 1 (0 points)
    Jun 6, 2013 12:51 PM in response to briellie

    Seems to be working fine so far. Thanks, folks.

  • by Nathan Goldshlag,

    Nathan Goldshlag Nathan Goldshlag Jun 8, 2013 11:11 AM in response to Gunny Sack
    Level 1 (100 points)
    Jun 8, 2013 11:11 AM in response to Gunny Sack

    My 17" MBP from 2010 is working fine with 10.8.4, as it did with 10.8.3.  With Airplay going, Time Capsule backups are fast.

  • by mattb25,

    mattb25 mattb25 Jun 11, 2013 4:21 PM in response to briellie
    Level 1 (0 points)
    Jun 11, 2013 4:21 PM in response to briellie

    I need your help please.  I am stuck at "A Network Timeout Occured".  I did the kext install of 10.6.8 on my mid-2007 MBP.  I'm not sure what to do with the airportd part.  what do i do with that file?

     

         apple made a change in airportd that would cause the kext swap to make wifi refuse to link up with a      timeout error.

     

    After i run airportd I still have the timeout error.  This is driving me crazy.  Thank You in advance for any assistance.

  • by Gunny Sack,

    Gunny Sack Gunny Sack Jun 11, 2013 7:11 PM in response to mattb25
    Level 1 (40 points)
    Jun 11, 2013 7:11 PM in response to mattb25

    matt,

     

    Did you download the 10.8.3 version of airportd from Briellie earlier in this thread? If so, then you need to do the following:

     

    1. Turn off wifi.

    2. In the terminal, type or paste the following command:

    sudo mv /usr/libexec/airportd /usr/libexec/airportd.old

    3. Hit Return and enter your admin password.

    4. Now type this partial command, followed by a space: sudo cp

    5. Take the airportd you had downloaded from this thread and drag it onto the terminal right after the "sudo cp " part and then,

    6. Type /usr/libexec/airportd after that.

    7. HIt Return

    8. Turn on wifi.

    9. Reboot

     

    The Terminal commands just make a backup copy of your current airportd (which stands for Airport daemon) by renaming it to airportd.old and then copies the downloaded version into the directory /usr/libexec/.

  • by mattb25,

    mattb25 mattb25 Jun 12, 2013 3:31 PM in response to Gunny Sack
    Level 1 (0 points)
    Jun 12, 2013 3:31 PM in response to Gunny Sack

    That worked perfectly Gunny Sack!  Thank You so much for helping!  genius!

  • by lenn4rd,

    lenn4rd lenn4rd Jun 24, 2013 7:33 AM in response to Gunny Sack
    Level 1 (0 points)
    Jun 24, 2013 7:33 AM in response to Gunny Sack

    Thanks for your help, Gunny Sack and briellie! I'm running OS X 10.8.4 on my 2007 MacBook Pro and I'm using the 10.7.3 kext and the 10.8.3 airportd helper app now. Finally Time Machine doesn't decrease the Wi-Fi speed anymore. However, I noticed two things:

     

    Firstly, now I'm connected via 2,4 GHz compared to 5 GHz before I swapped the kext. My access point supports both frequencies and it would be nice if I could use the 5 GHz connection because seemingly only then mm MacBook uses full 300 Mbit/s transmit rate (in theory; with real transfer rates much lower, of course).

     

    Secondly (and more importantly), my Wi-Fi connection seems to stall when I'm not using it. Say, I open a longer article on a web site, start to read it and after a few minutes I can't open any other sites. The Wi-Fi icon still shows all four “bars” and I still have an IP address.

     

    In Console the following message is repeated once every minute:

     

    24.06.13 12:21:53,000 kernel[0]: en1: BSSID changed to 24:65:11:XX:XX:XX

     

    The BSSID belongs to my regular Wi-Fi network. When I disable and reenable Wi-Fi everything is back to normal.

     

    Did any of you notice these issues as well?

  • by Gunny Sack,

    Gunny Sack Gunny Sack Jun 25, 2013 4:06 PM in response to lenn4rd
    Level 1 (40 points)
    Jun 25, 2013 4:06 PM in response to lenn4rd

    lenn4rd,

     

    Do an SMC reset of your laptop. If, after that, you're still having the same problem, paste the following command into the Terminal and post the results back here:

     

    kextstat -kl | awk '!/com\.apple/{printf "%s %s\n", $6, $7}'

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