Q: OSX Yosemite Wifi issues

To answer an earlier post of yours. I have tried a factory reset on the bridged AE the office is connected to. No change for me.

Guys by the way you can go to the Apple Store and have them re-install Mavericks for you.

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.

Typing this for a second time because 10.10.4 Wi-Fi has become unreliable...

I have two retina MacBooks here. On the 13" I can use Wi-Fi- and Bluetooth together, but not on the 15". Same software, same modem.

I was going to check for relevant hardware differences but the text in System Report on both machines is screwed up. Seems Yosemite bugs are rife.

10.10.5 anyone?

OS X El Capitan Wifi issues here we come.

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!

I can use Wi-Fi and bluetooth together only if I physically sit the modem on top of the keyboard.

Does Apple sell sticky tape or can I use any brand?

rMBP 15", OS X 10.10.4 POS.

Would be nice to have 5GHz Wi-Fi.

Has Apple tested Wi-Fi and bluetooth simultaneously using the 2.4 GHz band only?

Gosh I hope so...

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!

It seems the conflict between Bluetooth and Wi-Fi occurs on Macbook Pros using 2.4 GHz Wi-Fi.

Yes I believe so, that is also my case. Since I don't have a 5GHz Wi-Fi router to avoid the problem, at least this workaround currently works for me.

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...