Q: OSX Yosemite Wifi issues

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

I've ordered a new modem (Netgear Air Card 790S) with dual band 5 GHz and 2.4 GHz Wi-Fi to replace my 2.4 GHz only modem and will post the outcome.

Mid 2012 15" rMBP

Modem Netgear Aircard 760S with 2.4GHz Wi-Fi only, range set to Long

Apple OS 10.10.4

Bluetooth kills Wi-Fi immediately; If I activate Bluetooth and then try to open a webpage, Safari's blue loading progress indicator stops at about 10% complete and will stay there until I disable Bluetooth, at which point the webpage loads immediately. The other Mac in the house is a 13" MacBook and doesn't exhibit the same problem.

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

Hi,

Tried turnbull's solution  but i still cant connect to the 5GHz network. No problems on 2.4GHz getting slightly bored of these issues now

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.

why does it say at the top of this thread "branched to a new discussion", and when I try to follow the link, I get "access restricted, contact administrator or person who directed you here?"

who is my administrator? who is "person who directed you here"? There are no links to contact them. Why are these unprofessional, clumsy diagnostic messages on the Apple website?

after 10.10.4 update my console is spammed with multiple messages like:

08/07/15 23:44:52,000 kernel[0]: IO80211ScanManager::startScan: Broadcast scan request received from 'airportd' (pid 52) ().

08/07/15 23:44:52,000 kernel[0]: IO80211ScanManager::startScan: pid 52 had pending scan request. Deleting.

08/07/15 23:44:52,000 kernel[0]: IO80211ScanManager::getScanResult: All scan results returned for 'airportd' (pid 52).

08/07/15 23:44:52,000 kernel[0]: IO80211ScanManager::startScan: Broadcast scan request received from 'airportd' (pid 52) ().

08/07/15 23:44:52,000 kernel[0]: IO80211ScanManager::startScan: Initiating scan.

LOTs of them!

What is going on with Apple programming?

Aliens.

I have tried--deleting bluetooth off the network connection, "always enabling" my network on my keychain, PRAM restarts, creating a new location. NOTHING WORKS FOR LONG.  It always goes back to dropping.  How did we get stuck with a $1600 laptop that drops internet every 5-10 min???

As for me, I am now pretty stable with wifi and a little bluetooth (magic mouse and sometimes external speaker) on my retina macbook pro late 2013 model. I do not know if this is the latest Yosemite update 10.10.4, that fixed the issues that I used to have. I use Airport Extreme (square box model, with dual band n wi-fi), and no tweaks, all on automatic settings. I do have 2.4 and 5 Ghz networks assigned with different names, though.

Replying to myself, but be advised:

After buying USB 802.11ac adapter: https://www.asus.com/us/Networking/USBAC56/ wifi looked fine, I got good connection speeds in LAN and WAN.

BUT and a BIG BUT is that now occasionally MBP Pro 15" Retina reboots itself. So my decision was to uninstall ASUS driver, put adapter away and use USB 3.0 HUB with 1GE ethernet connection and pull cable across my living room.

I've never seen this before, I downloaded latest drivers from ASUS website:

ASUS USB-AC56 Utility 2.3.3(For MAC OSX)

Driver version:Mac (ver. 2.3.3)

Now my MBP stays alive, no sudden crashes and reboots and I'm using this: http://www.macally.com/EN/?page_id=21416

Since MBP has only 2 USB ports, there is a need for USB hub and that is ok for me, I get 1GE interface with that and it is only working eth interface for now.