Q: OSX Yosemite Wifi issues

i am not sure, maybe the win7 wifi and bluetooth is implemented in another way? did you try to turn off bluetooth? does that change anything with your osx wifi connection?

After doing a little research and actually looking at the Broadcom board itself, my electronics background kicked in. Especially after revisiting WiFriedX and reading your new post. After studying the shielding in place over the Bluetooth Chip and Wi-Fi Chip soldered together on the same side of the board next to each other, the individual shielding over each chip is soldered next to each other on the same trace. This would explain the broadcast noise interference between the two. Redesign of this board should put the chips A) farther apart - shielded or B) one on the other side of the board - both shielded or C) two separate boards each shielded from one another. No matter, the current board design indicates noise interference by both chips being side by side and two shields soldered side by side on the same trace. Amplified by being enclosed in an aluminum case with the motherboard and Wi-Fi antenna. Solution: Redesign of the Broadcom Board and Proper shielding and placement of the Bluetooth and Wi-Fi chips. This could be the whole of it in a nut shell and explain USB 3.0 noise interference as well. Hope this makes sense. It does to me given my electronic experience. Let's see if Apple (bytes). Your thoughts please.

Simple: I completely agree with your post. Although I fear there are software/ driver issues maybe as well.

Although I fear there are software/ driver issues maybe as well.

One should check if there's excessive Bluetooth activity.

Just enabled Bluetooth should not interfere with WiFi.

At least one device must be transmitting constantly data via Bluetooth.

If Apple can't fix this by software, they should probably start preparing a major hardware replacement program.

Thank you for the reply. Yes, the software/drivers seems to be unlocking what the Broadcom board should be capable of doing. It's ironic to me that some purchased Wi-Fi amplifiers/range extenders and problem went away.

As well as 10.10.2 ran on my Mac Mini, I had to do 2 passes of zeros across the entire HD followed by a NPRAM reset holding the keys for 3 cycles, shutdown, and followed up by an SMC reset in order to remove any bit traces to revert cleanly back to Mavericks. Internet Recovery, of course. I also had to make sure my Mac was as close to OEM condition during this process.

I did the procedure before install of 10.10.1. and used App Store to update to 10.10.2. Ran fine.

It's hard to imagine opening up a brand new Mac only to find Yosemite having Wi-Fi issues as well. I see that the 10.10.3 seed is ready for download and testing, however, I am not ready just yet.

Yes, i can explain. It's because it's not a hardware issue, but a software-one. Yosemite simply screws up WiFi (in combination with certain wifi router hardware and settings). 

I can proof this because if you create a new user-account, and if you switch to this user-account, your wifi speed will be good!

Olaf

At least in one of the two cases I have, bluetooth interference is not relevant, as the problem persists, even with bluetooth turned off.

Johan-Kr

Please file bug-reports - there are various 'fixes' for this that work for some people, but wifi in Yosemite is fundamentally broken and unstable - it needs to be fixed properly - the only way Apple can do this apparently is to get lots of bug reports.

You make a very good point and appears to hold true for some. However, this does not explain a brand new Mac fresh out of box as the new user creates a new account and has this same Wi-Fi issue under Yosemite. The new Mac user has no option to revert to a previous OS X, either. This is a very complex matter and only band aids have been placed on the symptomatic issues. The root cause not clear. This one is hard for Techs and Engineers alike. You have to reproduce, not only the problem, also the environment in which the problem is taking place. 10 different models of routers, 10 ways a user set up the routers and different Mac models. This produces inconsistency that is hard to troubleshoot. Hence the frustration of us all. Take 2 Macbook Pro's each machine has it's own "personality" of it's own even though they were produced the same day with the same lot of boards and equipment. This has been the case in electronics as far back as I can remember and holds true to this day.

Good grief, some very strange things going on this afternoon.  Only the latest was this post area wasn't immediately live - all greyed out.  Anyway...

You and Hexdiy deserve a bloody medal.  Even if you do half enjoy it... (as I type your MBPs with personality posts just came in OMG time to leave the planet...!)

On Feb 1st I downloaded 10.10.2 14c109 (against Hex's advice!) after running various seeds - I do hope they have some knowledgeable people enrolled on the seed betas cos I ain't one of them but I did my bit - submitted quite a lot of bugs etc and wifi diagnostic reports etc

Anyway from Feb 1 until today all seemed well: for the first time since on Yos I was largely able to connect and remain connected to 5ghz on my 2.4/5ghz Brit Telecom Home Hub 5a. I tried to be a bit clever with move from a/n to a/n/ac but swiftly reverted.

On Feb 3 old connection probe with 5GHZ returned - I noticed it was self assigning IP address so resolved that and after a router reset - Bingo! all good for 2 days.

Today i noticed 5ghz cnnctn had dropped.  It wouldn't reconnect or not for long NB none of the old Invalid password nonsense. It didn't even ask for my password - a small progress...

I ran wifi diag and watched wifi performance - most peculiarly agitated signal - stable noise but signal up and down between -20 and -40 - have a screenshot

I also noticed Safari couldn't connect to internet - throughout I had ethernet on, and hub blue lights remained on and hub said internet connectivity was good.  AND i was and still am completely unable to log into Apple's Seed Discussion forum....

I then started to look at hub logs - God knows why they make no sense to me but their content was a) voluminous/continuous activity and b) some were very odd - an IPV6 connection attempt rejected? an attack suspected? The IPV6 definitely  not me (but I am a public BT fon hotspot )

I took lots of screenshots for the period when I couldn't connect back to 5ghz - the hub logs, the wifi performance, and also wifi diagnostic & monitoring logs - would you care to look at any to see if you can make sense of them especially the Hub activity logs?  You too Hex.

Cheers  Paul

UPDATE re Seed Forum access: so I just tried again and noticed on the login page an image hadn't downloaded - a blue ? icon instead - I right clicked and opened in a new tab - lo and behold its a "We'll be back soon - just updating the site" message.

If I didn't want to cry I would larf....

Hi Peppermint, my BT is already off; If is on the OSX side drop every 5 min.

They said they fixed it in the new software update but I'm having issues too Ill know better next  time when to update  to a new OS X   nothing but grief after mavericks   and logic X   isn't any better  crash after crash after crash  but keep going to   

                                               Network ... assit me..... diagnostics ... pick your wifi provider #  and press locate in  10 seconds you'll be connected      cheers

First time post on an Apple Support Forum after converting to Mac 5 years ago, so obviously this bug has bitten me too.  I was waiting to post until after upgrading to 10.10.2.

Purchased a new 13" MacBook Pro in December (model MGX92LL/A).  It came preinstalled with Mavericks, but I immediately upgarded to Yosemite 10.10.0.  I set up the machine as a new user (i.e. did not use migration assistant from my previous iMac).  I immediately and ever since have experienced the issues described below (note, these issues have occurred with 10.10.0, 10.10.1, and 10.10.2 public releases.....I'm not in the Developer Program and don't install any Beta's).  Also, I am using an Asus RT-N66R router, with the latest firmware, and have updated the firmware twice since buying the Mac with no difference in (lack of) performance with each firmware upgrade.  In addition, I have visible SSID's that are separately named for my 2.4 and 5 GHz networks.

5GHz Network Situation:

(1) Typically connects to the network within 10 seconds from sleep, but will then randomly disconnect every 5-10 minutes.  Reconnection involves turning wireless off and back on.

(2)  Bluetooth does not seem to impact downloads speeds when it is connected.  And downloads speeds are as expected WHEN connected (30 Mbs down, 5 Mbs up).

2.4GHz Network Situation:

(1)  Is already connected to the network when waking from sleep.

(2)  Has NEVER randomly disconnected from the network

(3)  If Bluetooth is on (connected to Magic Mouse), downloads speeds go from 30+Mbs to less than 1 Mbs.  Uploads speed, 5Mbs, is unaffected.

(4)  If Bluetooth is off, there are no issues.

A side note.....my router channel width is 20MHz for 2.4GHz network, and I have experimented with 20, 40, and Auto 20/40 MHz for the 5GHz network with no effect or improvement on the 5GHz band.

In addition, I deleted my Network Location and known networks with no improvement after upgrading to 10.10.2.

I have yet to contact Apple support, as I'm not so keen on reinstalling the OS, etc, as it hasn't seemed to help many others.  Hopefully, they will contact me directly from this post to perform some diagnostics that I can send their way.....or offer to replace my network card.

Good luck to all of us!!

you definitely shouldn't count on them contacting you from your post, try getting Apple Care to hook you up (if you are no longer covered, just ask for an exception)

peppermint wrote:

 

i understand that you are upset. if you need wifi for working and earning money, like me, there is a temporary workaround:

you can disable bluetooth in your macs system settings, then wifi is working fine, i experienced. also you can roll back to 10.10.1, like i did, then wifi is working fine, too. (10.10.2 wifi drops randomly and frequently, in my case).

 

I have had bluetooth turned off since 10.10.0 (yup, several months now,) which is exactly how long I have had terrible network issues on wifi.

Not trying to be a Negative Nellie, just pointing out that, as far as we know, there's no "fix" that works in the long run for everyone plagued with this &*^@.

Not to sound so forward, but, is this where we step in as a "Support Community" since no Apple fix has worked yet? How about sending, postage paid, a USB Mavericks Installer to each other. Install at your own risk. I made one using createinstaller. The Apple Store "Genius Bar" should take into account cases where the person's Mac is their source for work/income and be willing to put the older versions of stable OS X's on the Mac at customers request. This Yosemite problem has gone on too long, and, on New Macs as well for Apple not to meet this request. We paid top dollar. We expect top dollar service. We need to demand as a Mac Community the option of Lion, Mountain Lion or Mavericks on our Macs to have the stable running computer we paid for, today! Yosemite is just going to have to wait until.....a stable release for upgrade? Copies of the mentioned older OS X's should be handed to us for installation just as a "Thanks for being part of our Apple Family" and shipped to our door. No charge. That's all I got. Cheers to all who are hanging in there!