OSX Yosemite Wifi issues

Splitting the bands on my Homehub 4 was an instant fix for me too, after trying about 20 of the other ones posted all over the place. I'm not budging from 10.10.3 now until reliable wifi is reported from all sides. It seems weird to me (as a user with only intermediate skills) that what is more or less a single phenomenon should have so many suggested causes. Elsewhere in nature that would indicate something unifying and upstream, but someone would have spotted that in this case, surely.

Unfortunately, 10.10.4 did not help. Still needs to fix this using `sudo ifconfig awdl0 down` command.

Open networks works perfectly, but on WPA2 Enterprise networks speed drops down to 7 after a while.

We are using Unify AP PRO access points now (tried UAP, UAP-LR before). Tried different software versions, options.

No luck.

Also interesting that almost all MacBook Pro are affected, but in the same time almost all MacBook air laptops works like a charm.

And it looks like the issues begins then a lot of Apple devices met in one place.

Really tired to find solution...

Thanks Turnbull - this appears to have solved it for me.

It seems that Macbook Air's running Yosemite have an issue with automatically switching between 2.4GHz and 5GHz band widths on dual routers like the BT Home Hub. I've followed your instructions and have 2.4GHz and 5GHz showing separately. All recent IT equipment including Macbook Air & iPhone 5s is connected to 5GHz and older laptop and iPhone 4 to the 2.4GHz.

Nice one!

pigglywriggly - Good news. My router fix is also working on Yosemite 10.10.4 for me.

UpTheVale1876 - My issue was with a Macbook Pro Retina. Glad it's sorted for you. Wifi off/on and waiting a minute was becoming tiresome!

I am also aware of an acquaintance who again was with BT and fixed their Macbook Air in the same way.

There could well be multiple separate issues being reported in this thread, but this seems to be the fix for the Yosemite/BT Home Hub/connect from sleep fails combination. The likely culprit will be Yosemite, as Mavericks worked fine with the auto dual bands, but we can't rule out the router firmware having a bug that is now exposed. The last firmware auto update was February.

Would be very interesting if anybody with a similar issue but a different router brand could use a similar fix?

Dear all,

After upgrading to 10.10.4, my wifi still drop occasionally. I tried many of the methods in this thread but with no luck. However, I realized that when I tried to rescan the network, it recovered. Therefore, I figured out the command to rescan network ("airport -s"), and write a short command to rescan every 5 seconds:

while true; do /System/Library/PrivateFrameworks/Apple80211.framework/Versions/Current/Resourc es/airport -s; sleep 5; done

And it works for me! If you would like take a try, it is simple. Just open Terminal and then copy-paste above command then press <enter> for execution. It will display a lot of rescan information but please just ignore them. You can minimize the Terminal window and see if the connection problem solved (actually the network still drops, but within 5 seconds it is recovered, so I hardly feel the drop). The number of 5 in the above command can be adjusted shorter or longer, based on your situation.

If it works, and you would like to make it run in background, then you can first use <control + c> to stop the above command. Then, create and save a script (e.g., named "keepalive.sh") with the command above as the content (you can use TextEdit, vi, or any other editor to create one), change mode of it for execution (e.g., "chmod +x keepalive.sh"), and then run it in background (e.g., "./keepalive.sh &"), and then you can press <enter> then use "exit" command to quit Terminal.

Hope this helps, thanks and may all of you have a great long weekend!

No, my mini and imac are also affected. For me the only improvement in 10.10.4 is that wifi is a bit more reliable when wake from sleep. What remains is the download/upload-'cap':

I have the maximum 15 MB/1,5MB on Mavericks, Windows and tablet and smartphone are also unaffected. With Yosemity I still have only 5MB/450KB on wifi and the maximum 15MB/1,5MB on ethernet. And that is at 5 GHz, at 2,5 GHz it's halved!

It's frustrating, ridiculous and, frankly, scandalous after almost 10 months of yosemity. And now the Apple Music/iCoud music library-disaster....what is going on with Apple???

Hi timkuo313 and others, registered to this forum to share my test results and frustration with you. My setup is following:

Asus RT-AC68U as my home router / wlan base station, with latest official firmware available (3.0.0.4.378_4585). Multiple devices using home wlan without problems. My ISP provides me 350/20 cable modem connection, that is working fine in bridged mode as Asus RT-AC68U with dual-core CPU does all hard work with NAT and session tracking etc.

My Xbox One, my Smart TV my android-tablet and even my Windows-laptop, with 802.11ac gets full speed in local wlan and from net. Only issue is my Macbook Pro 15" retina, mid 2014. When using MBP internal WLAN adapter, I'm getting downstream speeds from speedtest.net from 2Mbps to 20Mbps, upstream stays consistently almost 20Mbps. Also transfers in home network from/to NAS are ridiculously slow with this new and fancy 2000 USD laptop.

On the other hand, my late-2010 Macbook Air, trustworthy travelmate with 802.11n WiFi kicks *** in same WLAN network. Constant transfer speeds from speedtest.net are something around 200/20Mbps. Both Mac's are running Yosemite 10.10.4. Only 5Ghz Wifi is available from my home router.

Just to make sure that problem is in Yosemite and MBP 802.11ac drivers, I have a simple USB 3 Macally HUB, with three USB 3.0 connections and one 1GE connection. With cable I get full speed in home network and from my ISP. Let's get even further, I bought Asus USB-AC56 wifi-adapter: https://www.asus.com/us/Networking/USBAC56/ and plugged into MBP 15", loaded driver from Asus website and BOOM running full speed in home wlan & ISP.

Both Macbooks are using same card type for wlan:

-- from MBP 15 --

Card Type: AirPort Extreme (0x14E4, 0x134)

Firmware Version: Broadcom BCM43xx 1.0 (7.15.166.24.3

-- from Air --

Card Type: AirPort Extreme (0x14E4, 0xD1)

Firmware Version: Broadcom BCM43xx 1.0 (5.106.98.100.24)

Shutting down awdl0 does not help with MBP and bluetooth is turned off. My only idea is that 802.11ac drivers or chipset firmware in MBP 15" retina with Broadcom AC chipset are crappy, and that is why there has been so many "fixes" around this problem. Yes, I have support case open, not going to reinstall operating system since 3rd party WiFi adapter works fine. List price for Asus is round 69 USD and it comes with detachable external antenna and USB cradle. USB cradle is for those (like me) who don't want to pull ethernet cables around house and need to have working wifi, regardless what Apple does with built-in adapter. Will be reporting more next week after contacting with Apple Support.

Thanks macwifi for the detailed experiments and test report! If the problem really comes from 802.11ac driver / firmware, hope this issue can be solve completely in 10.10.5 so we don't need any patch, workaround, or external hardware...

Ohwell, I did also try to lock down my router to 802.11n and 5Ghz band only. Well, my macbook air goes like bullet train again and this MBP 15" is 2-20Mbps downstream. Sometimes it my vary like 100Mbps suddenly but then it drops and drops and drops....

Internal MBP wlan gives me maximum 1300Mbps link speed, as it should be, but real throughput is like ADSL.

External Asus AC-adapter gives me constant 867Mbps link speed, and throughput is that from internet or local NAS. So re-installing OSX is not an option for me, since external adapter works fine and yes installation of that driver required boot and on network preferences it looks like 802.11n nic but works.

Now what comes to OS - reinstallation, it is just crap. You do not need to reinstall OSX to get wlan working, no. You just need working drivers or working firmware for your chipset.

Just my 2 cents and fistful of dollars to this conversation.

I finally had to fork out money to get this issue out of my hair. Was loosing a lot of money using my 4G connection on iPhone and iPad when am at home. My problem was not dropping connections, but the wifi connection shared via my MBA was basically unusable on iPhone or iPad. So I just bought the billion 3G wireless ADSL router, then also bought 's relatively new 2TB Airport Time Capsule. So I shared my internet connection, using the Time Capsule and my speed is back, but even better. So in all, bypassed  MBA wifi sharing nightmare. It's not the ideal solution and definitely not the cheapest but hopefully i've said bye to this costly nightmare. I think a lot of us are just troubleshooting and finding individual solutions, which sometimes works for others. Mine is just expensive but glad it's gone. Wishing others the very best as I know what a nightmare this has been.

I'm having the same issue, turning off bluetooth has resolved my issue but I still have the issue on 10.10.4.

Does anyone know if there is anything I can do myself? been googling different suggestions, tried most of them but I have to turn off bluetooth to even load a webpage.

First issue in 2 years. Late 2014 Macbook Pro running 10.10.4

The wifi dropping had been awful, the upgrade to 10.10.4 seemed to make the problem worse, not better.

After reading this I thought 'nothing to loose by renaming the 5Ghz', and so far the wifi has not dropped. I open my Macbook Air and the wifi is there and stays.... just as it should!!

So many thanks for this tip.

I am another frustrated Mac user. I have some colleagues with older OS versions and they don't have the problem. I've tried all the steps described in the discussion

* Delete certain system files

* Create a new Wifi location

* Move the keychain entries from the login to the system chain and allow access to all applications.

* New "clean" user account.

etc.

I also had a long support call with Apple to resolve the issue. Their last advice was to reload OSX, which I haven't tried yet. I hoped that the problem would finally go away with the new OSX release 10.10.4, but no it hasn't.

For me the difficulty is that I need to use an enterprise network using 801.X PEAP authentication with a configuration file. However, it also happens on unprotected 5 Ghz networks. Funny enough my iOS devices don't have the problem at all.

The problem seems to be connected to 5 GHz. My 2.4 GHz routers at home or at my work place work fine. With Mavericks I had no proplem, but problems started after upgrading to Yosemite. To me this has been the most problematic upgrade anyhow.

The symptoms are very curious. The negotiation takes a long time, but finally seems to succeed with the laptop having a proper IP address and all. Also from the router end all seems to be fine. However, no or only a few packages make it through even to the router. The behaviour is a bit intermittent with initially several ping packages making it, but getting successively worth. Our IT department recently bought a MacBook to test the issue, but funnily using a clean install of Yosemite they don't seem to have the problem. Hence, it seems that there are some system files that screw things up. So maybe cleaning out the entire wireless environment may help. However, I wouldn't know how to do this, hoping that reinstalling OSX may do this for me. If this doesn't help maybe a clean install will do.

None of my colleagues on Windows have a problem like this. For a company that actually promoting the total wireless environment I find this simply appalling. At least I would expect an Apple software engineer to post instructions how to completely reset the Wifi environment. Better even would be a small application that cleanly reinstalls the wifi part of the OS therefore avoiding a full clean install.

Software Versions:

CoreWLAN: 5.0 (500.35.2)

CoreWLANKit: 4.3 (430.38.1)

Menu Extra: 10.3 (1030.34)

System Information: 9.0 (900.9)

IO80211 Family: 7.3 (730.60)

Diagnostics: 4.2 (420.71)

AirPort Utility: 6.3.5 (635.2)

Interfaces:

en0:

Card Type: AirPort Extreme (0x14E4, 0xEF)

Firmware Version: Broadcom BCM43xx 1.0 (7.15.166.24.3)

MAC Address: 14:10:9f:d5:33:43

Locale: FCC

Country Code: DE

Supported PHY Modes: 802.11 a/b/g/n

Supported Channels: 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 36, 40, 44, 48, 52, 56, 60, 64, 100, 104, 108, 112, 116, 120, 124, 128, 132, 136, 140

Wake On Wireless: Supported

AirDrop: Supported

Status: Connected

Software Versions:

Software Versions:

CoreWLAN: 5.0 (50

Just to give an update on what didn't work. I had to reinstall Yosemite last night. This didn't solve the issue. This was the last recommendation by Apple support. At my work place there are different enterprise routers and access points. Hence, I don't necessarily think this is an issue of exposing a bug in a specific router firmware. To me this seems to be a fundamental problem/bug in Yosemite now with its 4th upgrade not having been resolved nearly 9 month after the release date!

Yea I agree. My instinct was to NOT reinstall. I've been with Apple from almost the beginning and OS reinstalls are for critical failures, I don't class this as that. There is clearly an issue in the OS, otherwise we are looking at almost pandemic corruption in networking, which itself suggests an OS issue. If this is the case a reinstall would be either a temporary fix, or a lucky fix. Given the risk of loosing data since I have had backups not be recognised by the installer I'm not willing to wipe my drive without a **** good reason.