Q: OSX Yosemite Wifi issues

I can´t confirm that. In fact, I can confirm that I still have the problem. Just updated to 10.10.2 beta and the problem is still here. After rebooting I thought it was working because I was already pinging google for more than a minute (I couldn´t do that before). So I opened two more apps. Email client and browser. Started to run a youtube video and boom.. drop.

I was also pinging google at the same time with my other machine running linux and it´s still pinging right now. So it was not a router or internet problem.

I had to disable/enable wifi to be able to connect to my network again. But, after a few more seconds.. drop.. again.

So, right now I´m writting you guys using an ethernet cable (again).

So, I´ll still waiting for Apple to fix this damm problem. :/

Just updated to beta 10.10.2 ... waiting to see how it goes, will stream a movie later, that usually kills it.

OK people, lets go drastic: go to Activity Monitor, select the Discoveryd ProcessID and kill it altogether with the stop button in the upper left hand corner. Check what happens. Be sure to have a backup beforehand!

If all goes well, do the same upon every restart.

If Discoveryd is gobbling up to 100% of your CPU, that being 1 whole processor core, and it not multithreading, there you have your issue.

To all of you here familiar with Terminal, this: http://www.manpagez.com/man/8/discoveryd/

And something else: remember Charlie Hebdo. Consider it the 9/11 within Europe. Sorry for the offtopic. But it has occupied me tonight. 

Didn´t understand your comment. This Discoveryd ProcessID has something to do with the wifi issue?

Didn´t get it.

My 14C81f seed helped considerably but the mail still took a very long time to send a message regardless of how small a file size it was. I just installed the latest (Jan. 7th, 14C94b ) seed and that mail glitch is all fixed, and no problems elsewhere either. Hope's on the horizon :-)

Didn´t understand your comment. This Discoveryd ProcessID has something to do with the wifi issue?

Didn´t get it.

The only Yosemite specific WiFi issue is in fact caused by some bug in Discoveryd. What actually seems to happen is: though your Mac seems to be in radio contact with your WiFi router (as shown in the antenna symbol), DNS is no longer resolved. Thence: no internet.

When this happens: check your Activity Monitor. Probably the Discoveryd process will be gobbling up 100% CPU. At that point you can regain internet access

by force quitting Discoveryd. But by doing that you will lose all connection to the rest of your network (iDevices, network printers, other computers...). So it is only a handy workaround if you just need to regain internet access quickly.

Also read this very interesting sister topic: discoveryd process uses 100% CPU - Safari Can't find the server

Thank you. This explains the bug I encountered when I would open Safari after using Firefox. Firefox was not my default browser and worked fine. If I made Firefox my default some Apps did not like it,

You may confirm this for me. The software map that gets tossed in the trash can happened at least 5 to 6 times in one sitting. As i told you in a previous post. You did confirm that this was probably Discoveryd. I had a full running Mavericks install on ext HD and Yosemite installed as primary OS X. Plus a backup of some purchased Apps in a folder not eluding to Applications by name or Title. Unplugging the ext HD with Mavericks did not stop the tossed software map. When I took all backed up applications away from Yosemite, the Software map dumping ceased. It's as if Yosemite wants to be the sole proprietor of Apps and Purchased Apps. I have to ask for some enlightenment here. Seems Discoveryd is doing more than just DNS resolutions.

What actually seems to happen is: though your Mac seems to be in radio contact with your WiFi router (as shown in the antenna symbol), DNS is no longer resolved.

I must note that on occasional restarts or first boot up . Upon logging in I have noticed this WiFi behavior in Mavericks on my Mini as well, that you have pointed out. Not often, but, it's presence  let's itself be known.

The MBP (late 2012) I bought from Apple Refurb for my wife came with Mavericks. Seems all they do is prep the reburbs for sale, polish them "Like New" sold as is with 90 day Apple Care. Got lucky.

There is a better way to reset discoveryd.

sudo discoveryutil mdnsflushcache;sudo discoveryutil udnsflushcaches;say flushed

It could be in a cron job. I have not noticed this issue related but I will watch it.

However, I was "playing around" with some network parameters for performance and I came upon these and this article.

https://rolande.wordpress.com/2010/12/30/performance-tuning-the-network-stack-on -mac-osx-10-6/

Since I did this I have not had the problem against.

Hi John,

You may confirm this for me. The software map that gets tossed in the trash can happened at least 5 to 6 times in one sitting. As i told you in a previous post

could you please get a bit more specific and tell us which exact map gets tossed? Something to do with Discoveryd?

Thank you!

Unplugging the ext HD with Mavericks did not stop the tossed software map. When I took all backed up applications away from Yosemite, the Software map dumping ceased. It's as if Yosemite wants to be the sole proprietor of Apps and Purchased Apps. I have to ask for some enlightenment here. Seems Discoveryd is doing more than just DNS resolutions.

What, oh what is Yosemite/ Discoveryd dumping automatically, John, please? Seems like Airdrop falling quiet when you took took all backed up applications away from Yosemite...

And that would lead us back to WifriedX: https://medium.com/@mariociabarra/wifriedx-in-depth-look-at-yosemite-wifi-and-aw dl-airdrop-41a93eb22e48

Good hunting, compañero!

Well, cbitterfield, you may have struck the mother lode here. This issue may well be about system control keepalive timers as per your link:

https://rolande.wordpress.com/2010/12/30/performance-tuning-the-network-stack-on -mac-osx-10-6/.

Especially the sysctl.conf file has to be kept an eye upon/ has to be customized.

Nothing Yosemite specific, but Yosemite actual it seems. Many thanx!

N.B.: the Yosemite network stack is ailing anyhow it seems.

If you have upgraded to yosemity turn off blue tooth!!

When running Yosemite 10.10.1. After installation is complete and I had everything set and hooked up like I wanted, A folder appears in the trash. " A Document Being Saved By Storeasstd ". Conditions: External HD with Mavericks. Primary Internal HD running Yosemite. A second External HD with backups of Install OS X Mavericks, Install OS X Yosemite and backups of my favorite colors of Apps.

Within this folder is a " Software Map " that's what it's called. It opened in Text Edit with a double click. What it looked like is that Yosemite ( yes I'm Blaming 10.10.1 it doesn't happen in Mavericks ) is mapping out where all of it's components are installed. So it reaches out above and beyond. It found I had the same Apps in the Mavericks install and what was backed up. So I did what any trouble shooter would do, I unplugged Mavericks ext HD. A restart, then poof!! There it was. Emptied trash. So, I unplugged the other ext HD containing Apps backups. Emptied trash, restart, Abra Cadabra! The persistent problem stopped. I have to say that, in truth, this was, along with Wi-Fi taking so long to connect at start up or login, the only issues I had with Yosemite. There were times that the Wi-Fi symbol in the Taskbar was greyed when it was actually connected. Mavericks does this little giggle too. I am back on Mavericks at the moment and I will be out of pocket with my work. I will monitor.

I have had no problem with Bluetooth since upgrading to Y 10.10.1 or whilst testing 10.10.2

I've been getting the occasional "Safari can't find.." message so next time I will check for 100%CPU gobbling by DiscoveryD