Q: OSX Yosemite Wifi issues

Hi Tschnurr1. If you have Mavericks already saved in Apps Folder or available for download in Purchases of your App Store you can revert back. If your Mac shipped with Mavericks you can use Internet Recovery. Otherwise, it is not readily available for Purchase or Download from Apple at all right now.

If you revert your Mac to OS X Mavericks 10.9.5 you will have to use the older versions of iMovie and iWorks suite. Hope this answers your questions. Cheers!

okay thanks. I will try whether this solves WLAN issue. Just see that iMovie 10 was released same time as Mavericks. So lets see how this works. Current OS X Yos is really not acceptable. IN CASE SOMEONE FROM APPLE READES THIS. WHAT THE **** ARE YOU DOING AND STOP DEVELOPMENT OF THIS **** OF WATCH or ICAR AND FIX OS X BUGS 1ST! OR AT LEAST PROVIDE US WITH OLD KEYBOARDS & MOUSE WHEN BLUETOOTHS SEEMS TO BE THE ISSUE

and thanks Apple ! 10.09 can't be installed in case 10.10 is running. GREAT!

WHAT about hosting a demo in front of an Apple Store e.g., Frankfurt in order to wait in chairs until this issue get's fixed. I think this would have a good media effect ;-) Is there a Facebook group with that already ?

To roll back to Mavericks, you first need to make a complete copy of the internal drive. Super Duper works great for this. Disconnect the backup disk.

After making a full backup, either boot from internet recovery (in case the machine was originally delivered with Mavericks), or a USB boot stick made from the Mavericks install image.

You then need to enter disk tools and completely wipe the drive. Reboot and reset Pram.

Boot again from either internet recovery or boot stick and install.

Note: you cannot get back your documets and settings by using transfer assistant and time machine. You need to manually transfer back bits and pieces from the copy you made. Most program settings will be lost. Make very sure that you have the license code for MS Office available.

Johan-Kr.

PFJ30 wrote:

 

Hi Steve626

 

Does your Co wifi operate over single or dual bands?

 

Regards Paul

Dual bands, 2.4 GHz as well as 5 GHz. I also forgot to mention that we are all on WPA2 Enterprise. However we also have a Guest network, also heavily used  by both Macs and PCs (I don't know what OS the guests are using however) and the Guest network is also dual band.

From the user perspective, we just select the company WiFi network, which has one single name. The choice of 2.4 or 5 GHz seems to be done automatically somehow, because the network name is just one single name, regardless of whether one ends up on 2.4 or 5 GHz.

I get to hear about complaints regarding our IT services because I'm on this advisory board. However WiFi complaints are quite rare here, despite extremely heavy use by thousands of people. I will try to find out the make/brand of router, I can see one on the ceiling in our conference room, but will have to climb on a chair to see what it is exactly.

That said, I have, once in a while, seen WiFi "voodoo." Yesterday a Mac laptop in my workplace office (which is quite far from the router), running 10.7.5, could not connect to wireless, with some of the symptoms even resembling those being reported here in the forums. Turned WiFi off and on a few times and then connected no problem. Also, with my personal laptop running 10.9.5 (Macbook Air), I was in a hotel a few weeks ago and could not connect to hotel WiFi, although my iOS 8 iPhone had no trouble.  And on a different visit, same Macbook Air (10.9.5) connected in same hotel (different room) with no issues. I call this "voodoo" and would attribute it to local interference or router conditions.

I take the reports in this forum seriously -- which is why I am still on 10.9.5 on my personal laptop (we actually have Macs running 10.6, 10.7, 10.8, and 10.9 in our home, plus two wireless printers, a wireless blue-ray player, and 3 or more iPhones, all with very solid WiFi), but at work I don't really have a choice, they've moved on to Yosemite for our work laptops but so far I have seen no issues with that.

At work our laptops are running Yosemite and are basically "out of the box" plus all the stuff our IT folks load them up with (full disk encryption, anti-virus, anti-malware, auto-backup to a cloud service, extensions to allow the boss to push software updates to us involuntarily) and they are remarkably stable. Still, after reading through these forums I am waiting on my personal computers on updating to Yosemite, for me Mavericks seems very trouble free.

A few patterns I've noticed in these forums:

Does it seem like a preponderance of problems are being reported from outside the US? I see many references to British Telecom and other countries. Just asking. The wireless n channels are defined a little differently (I think) in different countries, based on a wiki I read recently.

I see some postings by people who either added or removed a wireless bridge or access point and say it "fixed" the problem. Makes me wonder about local conditions being a factor.

I see postings by people who "cleanly" reinstalled the OS (10.10) and say their issues are now "fixed."

Not sure what to think overall.

Try updating to OS X 10.10.2 from the Mac App Store, it addresses different WiFi issues.

"Try updating to OS X 10.10.2 from the Mac App Store, it addresses different WiFi issues."

This truly just made me laugh out loud. If anything 10.10.2 made the issue worse for me.

PFJ30 wrote:

 

Hi Steve626

 

Does your Co wifi operate over single or dual bands?

 

Regards Paul

P.S. Today, was on 2.4 GHz in my office, then walked over to a conference room, and am now on 5 GHz (apparently switched over, unbeknownst to me). I tested and obtained 1100 Mbits/s downlink and 1000 Mbits/s uplink on wireless.

steve626 wrote:

 

PFJ30 wrote:

 

Hi Steve626

 

Does your Co wifi operate over single or dual bands?

 

Regards Paul

P.S. Today, was on 2.4 GHz in my office, then walked over to a conference room, and am now on 5 GHz (apparently switched over, unbeknownst to me). I tested and obtained 1100 Mbits/s downlink and 1000 Mbits/s uplink on wireless.

Correction -- 110 Mbits/s downlink and 100 Mbits/s uplink on wifi.

Glad you made that correction- I was trying to unsmack my gob when it came through!!

Re references to British Telecom - don't make the mistake I made when looking at lots of "BT" refs - that tends to be Bluetooth not our BT..

I certainly don't know what to think overall. I know I have not suffered anywhere near as bad as some others did but its hard to know if 10.2 or 3 has helped them - would be nice to be able to ask everybody who posted say to mid-December to come back and report?

I really appreciate JD and Hexdiy's commitment but I am not in their class of understanding

and thanks Apple ! 10.09 can't be installed in case 10.10 is running. GREAT!

I think Johan-Kristian's reply in the post directly underneath yours is the answer to your failure to install Mav.

Huss417 wrote:

 

"Try updating to OS X 10.10.2 from the Mac App Store, it addresses different WiFi issues."

This truly just made me laugh out loud. If anything 10.10.2 made the issue worse for me.

That's exactly why I posted this early last morning:

Workaround not yet published in this thread:

Not particularly to you John, but to all concerned here, particularly to those who may have performed a clean install, but migrated old troubles afterward from a Time Machine backup, possibly using Migration Assistant:

Please search for IO80211Family.kext on your Mac. Especially if you have multiple copies of it, check their version numbers. There may be a clash going on here between identically named kernel extensions with different version numbers (7.1 being the most recent) . Revert to IO80211Family.kext 7.0 any way you can, and see what happens. Thrash all other versions, empty thrash and restart. And only 1 version of IO80211Family.kext should reside on your system! Even if you decide to stick to your resident v.7.1. Any duplicate antiquated kext is bound to cause havoc.

Except for 10.10.2 WiFi issue dupes: their salvation may lie in IO80211Family.kext 7.0.

Re: wifi keeps dropping since Yosemite upgrade

In particular if you have not cleanly installed 10.10.2 and have migrated from 10.10.1 using Migration Assistant look for 2 versions of IO80211Family.kext. If you find both v.7.0 and v. 7.1, then delete v. 7.1. If you find only v.7.1, replace it with v. 7.0 and see if things improve. Good luck!

> would be nice to be able to ask everybody who posted say to mid-December to come back and report?

I'm fine, and have been for some time now. Not sure if it was 10.10.3, changing my WiFi signal to static, or the 'delete-and-add-a-new-wireless-service' hack, but I'm happy. Now, that said, I only connect at 2.4 GHz, don't use Bluetooth (never have, so it's always been disabled), and my MacBook Pro's too old to use AWDL0. Throughput's never been an issue for me, and only sporadic, infrequent drops -- all seems good. Cautiously optimistic.

MacBook Pro 6,2 (Mid-2010)

OS X 10.10.3 (14D87h)

Broadcom BCM43xx 1.0 (5.106.98.100.24)

**** those logout timers; once again the edited version:

Huss417 wrote:

 

"Try updating to OS X 10.10.2 from the Mac App Store, it addresses different WiFi issues."

This truly just made me laugh out loud. If anything 10.10.2 made the issue worse for me.

That's exactly why I posted this early last morning:

Workaround not yet published in this thread:

Not particularly to you John, but to all concerned here, particularly to those who may have performed a clean install, but migrated old troubles afterward from a Time Machine backup, possibly using Migration Assistant:

Please search for IO80211Family.kext on your Mac. Especially if you have multiple copies of it, check their version numbers. There may be a clash going on here between identically named kernel extensions with different version numbers (7.1 being the most recent) . Revert to IO80211Family.kext 7.0 any way you can, and see what happens. Thrash all other versions, empty thrash and restart. And only 1 version of IO80211Family.kext should reside on your system! Even if you decide to stick to your resident v.7.1. Any duplicate antiquated kext is bound to cause havoc.

Except for 10.10.2 WiFi issue dupes: their salvation may lie in IO80211Family.kext 7.0.

Re: wifi keeps dropping since Yosemite upgrade

In particular if you have not cleanly installed 10.10.2 and have migrated from 10.10.1 using Migration Assistant look for 2 versions of IO80211Family.kext. If you find both v.7.0 and v. 7.1, then delete v. 7.1. If you find only v.7.1, replace it with v. 7.0 and see if things improve.

Some explanation:  IO80211Family.kext versions since the Lion one have been reported to cause trouble, in most cases on some iMac models. Reverting to the IO80211Family.kext version -1 after an OSX.(X)X.X+1 version upgrade seems to result in better performance.

And having identically named kernel extensions, even if they have a different version number running in your system is asking for trouble in my book.

Quote from an unallowed source:

"Kext Fix"

I tried copying the IO80211Family.kext from a Mavericks machine, which didn't work. I then restored the original Yosemite IO80211Family.Kext which fixed my Wi-Fi. I used Kext Utility to do this, so I assume some of the 'permission fixing' Kext Utility reforms on /System/Library/Extensions must fix the Wi-Fi.

Kext Utility is available here

1. Open Kext Utility.
2. Let it repair permissions, it will tell you when it's done.
3. Reboot.

If that doesn't work, download the IO80211Family.kext from solution 6. and install that IO80211Family.kext after "Step 2." completes, continue as follows:

1. Test that Wi-Fi is broken, or fixed.
2. Open Kext Utility (if broken still).
3. Drag original IO80211Family.kext back.
4. Reboot.
5. Wi-Fi should be fixed.

Remember that kext files are stored in /System/Library/Extensions, you should make a backup (Kext Utility does do this for you, however) of your original IO80211Family.kext.

Good luck!

OK, 1 more try for the source of the quote to work around these ridiculous censor bots on this forum : it was reddit.com:

http://www.replace.com/r/apple/comments/2jwah7/psa_yosemite_wifi_issues_list_of_possible_fixes/