os x 10.10.3 installed and wifi slowed down

I've also had the issue - wifi starts fast then slows down - MBPr 15 late 2014 with latest Yosemite and "supplement"; Turning off BlueTooth was one fix, however thanks to this thread over on WiFried (scroll down to the "One Last Thing"), I'm fixed as well now without turning off BlueTooth - at the expense of AWDL being disabled, so no AirDrop, or AirPlay from my MBP - but since I use those way less than BlueTooth, it's a tolerable fix for now - Not perfect tho, so I'm also looking forward to 10.10.4x 🙂

https://medium.com/@mariociabarra/wifried-ios-8-wifi-performance-issues-3029a164 ce94

@sks@mac.com

Is this also the solution because I do not understand it.

Still searching for a solution to fix the wifi problem.

kimmoli wrote:

Hi,

I have MacBook Pro 13" (Late 2013). After I upgraded Yosemite from 10.10.2 to 10.10.3, then my WiFi slowed down. WiFi connection seems to be stable, but I can see higher latency and small packet loss.

Here is report from mtr (combined traceroute and ping):

HOST: Kimmo-MacBook-Pro-2.local Loss% Snt Last Avg Best Wrst StDev

1.|-- homerouter.cpe 0.0% 100 6.5 54.4 2.9 225.5 72.2

2.|-- ggsn4.m.dnaip.fi 0.0% 100 26.0 93.0 21.9 328.7 81.4

3.|-- hel5-sr3.dnaip.fi 0.0% 100 23.3 99.7 22.0 338.7 79.7

4.|-- hel5-tr3.dnaip.fi 0.0% 100 217.2 107.3 22.6 316.4 84.6

5.|-- esp2-tr2.dnaip.fi 1.0% 100 125.7 90.6 22.6 269.9 72.1

6.|-- hol1-tr2.dnaip.fi 0.0% 100 29.6 95.9 24.1 312.8 83.9

7.|-- lah1-tr1.dnaip.fi 0.0% 100 39.6 104.1 23.2 364.0 87.6

8.|-- lah2-er1.dnaip.fi 0.0% 100 25.0 92.9 22.2 262.2 75.5

9.|-- lah2-er70.dnaip.fi 0.0% 100 27.7 109.4 19.2 329.6 86.7

10.|-- virtualwww-2.phnet.fi 3.0% 100 110.5 107.3 25.0 1047. 122.9

Average latency to destination is 107ms. Same time if I run nice trace from iPhone 6 Plus (which is connected to same wifi network), latency is always less than 40ms. I have also checked with Wireshark, that there is no inbound or outbound traffic which could describe the latency.

Here is FTP transfer from ftp.funet.fi:

lftp ftp.funet.fi:/dev> mget 100Mnull

104857600 bytes transferred in 54 seconds (1.84M/s)

I can get over 5 MB/s with Windows laptop.

It looks like some kind of internal buffer is full from time to time (or wifi driver is broken) and latency gets high from time to time.

Kimmo-MacBook-Pro-2:~ xxxx$ ping ftp.funet.fi

PING ftp.funet.fi (193.166.3.2): 56 data bytes

64 bytes from 193.166.3.2: icmp_seq=0 ttl=248 time=40.237 ms

64 bytes from 193.166.3.2: icmp_seq=1 ttl=248 time=54.343 ms

64 bytes from 193.166.3.2: icmp_seq=2 ttl=248 time=104.191 ms

64 bytes from 193.166.3.2: icmp_seq=3 ttl=248 time=146.785 ms

64 bytes from 193.166.3.2: icmp_seq=4 ttl=248 time=207.600 ms

64 bytes from 193.166.3.2: icmp_seq=5 ttl=248 time=251.258 ms

64 bytes from 193.166.3.2: icmp_seq=6 ttl=248 time=251.867 ms

64 bytes from 193.166.3.2: icmp_seq=7 ttl=248 time=27.704 ms

64 bytes from 193.166.3.2: icmp_seq=8 ttl=248 time=70.930 ms

64 bytes from 193.166.3.2: icmp_seq=9 ttl=248 time=30.851 ms

64 bytes from 193.166.3.2: icmp_seq=10 ttl=248 time=29.715 ms

64 bytes from 193.166.3.2: icmp_seq=11 ttl=248 time=25.392 ms

64 bytes from 193.166.3.2: icmp_seq=12 ttl=248 time=23.275 ms

64 bytes from 193.166.3.2: icmp_seq=13 ttl=248 time=72.797 ms

64 bytes from 193.166.3.2: icmp_seq=14 ttl=248 time=122.148 ms

64 bytes from 193.166.3.2: icmp_seq=15 ttl=248 time=170.822 ms

64 bytes from 193.166.3.2: icmp_seq=16 ttl=248 time=211.093 ms

64 bytes from 193.166.3.2: icmp_seq=17 ttl=248 time=230.666 ms

64 bytes from 193.166.3.2: icmp_seq=18 ttl=248 time=25.860 ms

^C

--- ftp.funet.fi ping statistics ---

19 packets transmitted, 19 packets received, 0.0% packet loss

round-trip min/avg/max/stddev = 23.275/110.397/251.867/83.267 ms

If I share internet connection from iPhone WiFi, i am seeing same latency issue, So the problem is not related to specific WiFi network.

If I log in with guest account, the problem seems to be gone.

If I shutdown AWDL (Apple Wireless Direct Link) interface (At least AirDrop and AirPlay services uses it), then my latency/speed issue is gone.

Kimmo-MacBook-Pro-2:~ kimmo$ mtr ftp.funet.fi --report --report-cycles 100

Start: Sat Apr 18 13:48:32 2015

HOST: Kimmo-MacBook-Pro-2.local Loss% Snt Last Avg Best Wrst StDev

1.|-- dyfyyf0m6gwys--txwkfy-4.r 0.0% 100 3.3 54.1 2.1 244.7 67.8

2.|-- ggsn4.m.dnaip.fi 0.0% 100 36.4 101.5 24.5 331.1 83.4

3.|-- hel5-sr3.dnaip.fi 0.0% 100 32.0 106.4 23.3 256.2 78.5

4.|-- hel5-tr3.ip6.dnaip.fi 0.0% 100 169.4 91.3 20.4 322.9 72.0

5.|-- esp2-tr2.ip6.dnaip.fi 0.0% 100 68.5 94.3 24.7 388.9 81.4

6.|-- csc.ficix1.ficix.fi 0.0% 100 54.4 92.6 27.6 272.6 76.5

7.|-- csc2-xe-0-0-0-0-csc6.fune 0.0% 100 30.8 94.9 24.8 262.0 76.2

8.|-- csc3-xe-0-0-0-0-csc2.fune 0.0% 100 33.8 100.3 25.1 282.0 76.6

9.|-- ftp.funet.fi 1.0% 100 114.0 98.0 24.7 252.5 75.4

(average latency is close to 100ms)

Speedtest:

lftp ftp.funet.fi:/dev> mget 100MBnull

104857600 bytes transferred in 48 seconds (2.10M/s)

Then i shut down awdl0 interface:

Kimmo-MacBook-Pro-2:~ kimmo$ sudo ifconfig awdl0 down

And check the latency again:

HOST: Kimmo-MacBook-Pro-2.local Loss% Snt Last Avg Best Wrst StDev

1.|-- dyfyyf0m6gwys--txwkfy-4.r 0.0% 100 5.6 6.2 1.6 13.0 2.7

2.|-- ggsn4.m.dnaip.fi 0.0% 100 33.9 31.9 25.2 39.3 3.1

3.|-- hel5-sr3.dnaip.fi 0.0% 100 32.4 34.3 26.5 99.6 11.2

4.|-- hel5-tr3.ip6.dnaip.fi 0.0% 100 32.3 32.2 23.2 77.3 6.5

5.|-- esp2-tr2.ip6.dnaip.fi 0.0% 100 38.8 34.3 26.7 78.7 9.0

6.|-- csc.ficix1.ficix.fi 0.0% 100 33.0 32.8 21.5 75.0 5.5

7.|-- csc2-xe-0-0-0-0-csc6.fune 0.0% 100 37.3 31.7 24.6 37.4 2.8

8.|-- csc3-xe-0-0-0-0-csc2.fune 0.0% 100 40.6 34.4 24.5 85.9 9.0

9.|-- ftp.funet.fi 0.0% 100 38.6 33.4 27.4 43.4 3.6

(average latency is close to 35ms).

Also speedtest:

lftp ftp.funet.fi:/dev> mget 100MBnull

104857600 bytes transferred in 14 seconds (7.14M/s)

So when will Apple fix this? This is 100% reproducible with my setup. If you have latency or speed issues with WiFi after 10.10.3 upgrade, please try that tip and check if it helps. It would be nice to know if this helps for others too.

sks@mac.com wrote:

I've also had the issue - wifi starts fast then slows down - MBPr 15 late 2014 with latest Yosemite and "supplement"; Turning off BlueTooth was one fix, however thanks to this thread over on WiFried (scroll down to the "One Last Thing"), I'm fixed as well now without turning off BlueTooth - at the expense of AWDL being disabled, so no AirDrop, or AirPlay from my MBP - but since I use those way less than BlueTooth, it's a tolerable fix for now - Not perfect tho, so I'm also looking forward to 10.10.4x 🙂

https://medium.com/@mariociabarra/wifried-ios-8-wifi-performance-issues-3029a164 ce94

Thanks sks. Disabling AWDL fixed also my latency and speed issues. FTP speeds from internet increased from 2 MB/s to 7 MB/s. Average latency from home network to internet went down from 100ms to 35ms.

@kimmoli

Hi pal, There's a lot of variations of issues that people keep coming on here with, however I can confirm that I have exactly the same issue as yourself down to a tee!

I have a Late 2013 rMBP 13", WiFi speed is vastly bottlenecked on initial login, then if I login to another user account the problems rectifies itself.

I will try switching the AWDL off now and let you know what happens. Did it speed back up as soon as you turned it off or did you have to re-boot after turning the AWDL off?

Also have you tried a full erase and re-install of OS X yet?

@kimmoli

After just trying it right now, I can confirm that like yourself; when I type "sudo ifconfig awdl0 down" into Terminal that my WiFi connection comes back to full speed.

Do you think a full erase and reinstall will fix this? or do you think that even after doing a reinstall and updating to 10.10.3 again it will come straight back? In which case the only option is wait in hope that Apple fix it.

The biggest blag for me is that the issue only occurs on my home WiFi connection and not others.

OS X 10.10.4 Beta 1 Available for Mac Developers

http://osxdaily.com/2015/04/16/os-x-10-10-4-beta-1-available-for-mac-developers/

Hope they will fix the bugs..

Supreem wrote:

@kimmoli

After just trying it right now, I can confirm that like yourself; when I type "sudo ifconfig awdl0 down" into Terminal that my WiFi connection comes back to full speed.

Do you think a full erase and reinstall will fix this? or do you think that even after doing a reinstall and updating to 10.10.3 again it will come straight back? In which case the only option is wait in hope that Apple fix it.

The biggest blag for me is that the issue only occurs on my home WiFi connection and not others.

Nice to hear that it works also for you.

Most likely a full erase and reinstall won't fix this. Apple needs to fix their software.

Just installed kext utility and far it's working very good

http://cvad-mac.narod.ru/index/0-4

What does it do?

http://cvad-mac.narod.ru/index/0-4

I don't know what it does exactly, I'm not too involved with coding and hacking commands. All I know is that it replaces one or some of the kext files.

I bought my 21" imac 2 months ago, it already had OS 10.10.2, the internet was already slow on it, and nothing changed after upgrading to 10.10.3. After a lot fo research and troubleshooting, I stumbled onto this link, I downloaded the utility, once you open it it runs automatically. It does certain repairs for a few minutes, afterwards all you gotta do is reboot, and that's it.

I'll have to use the computer for a few days to confirm that everything is ok but so far it's good.

I don't usually post on these kind of bulletins, but this issue was frustrating to me that I thought I would share since I know a lot of people are having problems.

Hope it helps!

Thanks apple for NOTHING !!!!!!!!!

I have done the restarting and if anything, things are worse. This is not the Apple I know and have loved!!!

ME too. iMac mid 2010

This is the only good temporary fix that I've been alerted to as yet is this one:

http://www.engadget.com/2014/11/25/heres-the-root-cause-and-a-workaround-for-ios -8-and-yosemite-wi/

It will bring your WiFi back up to full speed, but you will need re-do the fix again if you shutdown your Mac and boot it back up.