Q: OSX Yosemite Wifi issues

Sorry... The D-link DAP-1520 does not allow for any changes in that regard. What I'd suggest is you (if your AP or router supports it) switching over to 5GHz 802.11n ...

That's part of the 802.11n standard to run it both on 2.4GHz and also on 5GHz...

Ususally one can have b/g/n on 2.4GHz (the standard is 20MHz spectrum on the 2.4GHz, but not all conform with that and use a 40MHz spectrum instead) and can have a/n/ac on the 5GHz range with 20/40/80/160MHz spectrum.

I have exactly the same problem! Since I turned off my bluetooth, all seems to be ok but I cannot use anymore my mouse and keyboard  that I recently have bought :-(

When Apple thinks to fix this problem? This is a quite annoying issue for my mac pro 13inc. 

jndupuis1 wrote:

 

I do believe Apple should, during this time, make available for download their known good stable releases of OS X free of charge to registered Apple ID's. Snow Leopard, Lion, Mountain Lion and Mavericks. So their loyal and many customers who are experiencing problems with Yosemite can revert back to get themselves up and running again. The Genius Bars, as well, should be readily available to assist Mac owners to revert their Macs back to a known stable past release of OS X that is capable of running on their computer. Basically, Apple "making good" to their customer base as Yosemite is still under development. Simply reaching out to Apple with this request and I do not believe this request is asking too much. Free downloads of past OS X's for registered Apple Users is not asking too much. Upgrade to Yosemite should be inevitable to Users and Apple when Yosemite becomes a working, stable release for all Macs. Apple, give us this option. I wish Yosemite would have been more thoroughly tested before release for Upgrade, at least 6 more months. Enough said, on my part. I'm just repeating myself from one of my previous posts. Cheers to all, again, who are hanging in there!

I agree that would be the customer-centric solution, but think there is -100% chance it happening. they could stop people from downloading and installing Yosemite, but they don't. This thread has 810,000 views, but apparently they are OK with inviting more people to this party. Shame on them.

Wonder if this post will get deleted too ????

If I physically place our modem on my rMBP running 10.10.2, then switch the mac on I can load webpages. (using 802.11n, 2.4GHz, Netgear Aircard 760S cellular in, wifi out)

If I then walk a few metres away, I cannot load a single webpage; At all; Ever; I've been trying for days. The menubar wifi signal strength radar symbol still states full strength though.

If I then switch the mac off, walk back to the modem, place it physically on the mac, switch the mac back on, webpages again load fine.

So it seems to me at the moment that the success everyone has had using a wifi extender is not as a result of the technology or band being used (802.11x, 2.4 or 5GHz), perhaps it's just that, for whatever reason, Yosemite demands greater wifi signal strength. If that's the case, their wifi menubar symbol is faulty.

Think I'll buy a DAP1520.

Edit: Forgot to mention that this was not the case on 10.10.0. Webpages loaded metres away. Our other mac on 10.10.0 doesn't exhibit the above behaviour and works fine though out the house.

Also forgot to mention this mac can load webpages metres away when in Recovery mode outside Yosemite, and that if the other mac is upgraded to 10.10.2, then it also cannot load webpages in the same manner.

I've just remembered our modem has a signal strength setting which I had set to Short. I've just changed it to Long and now I can load webpages again though out the house!!!!!!!!!!!!!!!!!!!!

So try that guys if you can.

Apple Wireless, it would seem the changes made to 10.10.0 for 10.10.2 placed greater dependance on wifi strength. And what does that menubar wifi symbol actually display? It's useless as it in no way reflects one's ability to be able to load webpages reliably.

I'm now getting 20 Mbps down (26 Mbps peaks) and 10 Mbps up, from a cellular modem and running 10.10.2. I've never seen such high speeds.

Sigh, all as a result of changing the modem's wifi transmit signal strength to its highest setting. It was so easy. Sob. Oh the pain.

Perhaps Yosemite's features simply demand higher wifi signal strength? Anyhow, all "fixed" here.

I agree.

I noticed in 10.10.0 and 10.10.2 that the TX Rate had dramatic fluctuation when idle and during activity. My TX Rate would go from approx. 130 Mbps to 365 then up to 405 Mbps then fall to 128 to 130 Mbps when activity slowed. Peculiar. Wi-Fi symbol never reflecting On or Off.

Mavericks, on the other hand, reaches a TX Rate of 450 Mbps and stays there. Never fluctuates or changes. My wife's MBP running Mavericks, goes to other points in the house and Tx Rate stays at 450 Mbps. Odd.

This tells me that the drivers in Yosemite and/or the OS itself are not accurately reporting Wi-Fi signal strength to each other appropriately, so it seems. In other words, when the WiFi level drops below a certain point, OS sees no connectivity, therefore Safari and other Apps will not be able to web content. This is merely a theory. I hope that Apple has enough diagnostics from a lot of us to nail this down, rapidly.

Side note. In Best Buy I walked up to and brand new iMac with Yosemite10.10.2 clicked Option + WiFi symbol and noticed a TX Rate of 132 Mbps after loading several web sites. Hmmm.

To all whom this may concern:

if you want to retrograde/upgrade to Mavericks or older and your Mac was originally delivered with Mavericks/ Mt Lion/ Lion: try this.

Make a bootable clone on an external medium (Carbon Copy Cloner or SuperDuper). Boot from that clone (SSD or HDD). Go to Disk Utility and completely zero your internal drive. Use multipass erase if you will. Zeroing out is important, we want to get rid of the invisible Recovery partition on the drive.

Afterwards, partition that internal drive with a GUID partition table and format it with Mac OSX Extended (Journaled).

Uncouple all external drives. Restart, pushing option-command-R. You will be guided to Internet Recovery/Netboot OSX, and be prompted to reinstall the OSX your Mac was originally installed with.

Sorry option to anybody having purchased a Mac coming with Yosemite, I know. For the others, we'll see.

And yes, you will be prompted for your Apple ID.

Good luck to all!

Source: http://osxdaily.com/2014/12/14/reinstall-os-x-mac-internet-recovery/

I'm now getting 20 Mbps down (26 Mbps peaks) and 10 Mbps up, from a cellular modem and running 10.10.2. I've never seen such high speeds.

Sigh, all as a result of changing the modem's wifi transmit signal strength to its highest setting. It was so easy. Sob. Oh the pain.

Perhaps Yosemite's features simply demand higher wifi signal strength? Anyhow, all "fixed" here.

Sigh... Slow speeds but all fixed, then ausappleuser? Good to know there is a transmit power selector...

hexdiy these are the fastest speeds I've had since buying the modem and mac back with Mountain Lion. One's slow speeds are another's fast - remember my modem is a cellular modem because we don't have any fixed line service. 26 Mbps on a 4G network here with 2 bars out 5 cellular signal strength is pretty good (we're on a country property).

As for that wifi symbol in the menubar, I think it needs work but it's not that simple; before increasing the modem's transmit power, I was able to obtain web access anywhere in the house while in Internet Recovery mode outside of Yosemite, while in Yosemite nothing at all despite the menubar displaying full strength. Now that the modem is set to full power, I can obtain web access anywhere in the house within Yosemite. Some aspect of Yosemite places a higher demand on Safari for a higher signal to noise ratio, and the menubar symbol offers no help with this.

So now I can put my house brick away - I was just in the middle of painting an apple symbol on it too when the penny dropped.

Commodore 64 and Amiga - Eat my dust.

As a side note...

I downgraded the worst of the two stuggling machines to Mavericks (formatted disk, and reinstall from USB key).

The user was still complaining about transmit speeds, so I connected to him with Teamviewer, and registered receive speeds of 7,5Mbit (normal for his connection) and receive speed of 0,23 Mbit/sec (should be about the same as receive speed).

I found a note at MacStadium, that said that starting with Mavericks, apple implemented a change in the Arp multicast protocol, snd that this caused problems with some routers. To fix it, I started terminal, and did as follows:

sudo su
touch /etc/sysctl.conf
echo net.link.ether.inet.arp_unicast_lim=0 >> /etc/sysctl.conf
chown root:wheel /etc/sysctl.conf
chmod 0644 /etc/sysctl.conf

After a reboot, I then went to advanced settings on Wifi, and changed the MTU from auto to manual and 1450.

the transmit speed was now up to 7,5Mbit/sec again.

I did the same trick on the other struggling machine (with Yosemite), and it seems the network speed is back to normal.

I've read every page of this thread, but I can't recall that arp mulicast trick has come up before. Can anyone check if this fixes the speed?

Johan-Kristian

Did not work for me

Well I threw in the towel, cried UNCLE (Apple you win; I lose), and headed to Best Buy to pick up a new router.  I changed to a Linksys AC1200+, just about the best they had (at least according to the sales person).  After installing the new router my connectivity issues virtually disappeared. I say virtually, because I’ve had one, and only one, WiFi drop in the two weeks since I’ve changed.  Also, there is the occasional hanging/slowness of Safari (this occurs about once every two to three days.  I can confirm it is Yosemite because the Windows machine right next to it works ok at the time of the hang-up).  This result holds for both .1 and .2 releases.  If anyone needs the data, by old router was a Netgear 802.11n 150 (WNR1000).   I’m running now on the 5 GHz channel.  I’d say this result supports the hypothesis that Apple simply did some ‘spring cleaning’ on their WiFi support.  I hope that helps those of you still struggling with this mess.

Hi Hex,, and does this work with earlier OS10s - snow leopard etc?

Two weeks does sound like a permanent fix - well done!

I would be very interested to hear from any Brits using BT HomeHub 5a - have you swapped, replaced it? Were BT easy to persuade?

I am still having intermittent drops on 5ghz, occasionally on ethernet too, (usually Hub remains blue) and the 2.4ghz that Apple Diagnostic tells me evrytime to junk in favour of 5ghz - solid as rock mostly

Time Machine did not eject has returned after a long absence...

But password invalid nonsense when accessing wifi seems sorted... was that 10.10.2 or me editing Keychain access???

MBP mid 2010, BH HomeHub5a, ex-Seed tester