Q: OSX Yosemite Wifi issues

This doesn't work for me.

I tried this 15 mins ago and so far so good. I'm actually beginning to feel a little less computer stress. Thnx Dr MiguelD!

Hi everyone,

I too have been having issues with my WiFi and Yosemite, however I am not sure that this is the same issue.

I upgraded my router to an ASUS RT-AC87U which supports 802.11AC several months ago.

Ever since then, WIFI on my MacBook Pro would be sporadic. Web pages would take forever to load at times, at other times they would load without incident.  The only thing that was consistent was that on my local network transferring a file from another computer to my MacBook Pro I was only getting transfer rates if between 5 and 7MB/sec even though I was connected and my TX rate would show that I have a rate of about 900MB/Sec or better.  I created a 3GB test file and between wired Macs, it would take about 40 seconds to transfer.  On a Mac that only had an 802.11n Airport card in it the same file would take about 2 1/2 minutes.  On my MacBook Pro with 802.11ac, the same file would take between 13 and 17 minutes.

The one thing that I never noticed was that WiFi actually dropping.  This is why I am saying that my issue may be something different.

If anyone else is having this particular issue please let me know and I can post how I was able to fix this.   Its been a week now and my LAN wifi speeds have been over 50MB/Sec and the test file that I created transfers in about 1 minute vs the 13 - 17 minutes before the fix.

Alas it seemed to work but the same thing is still happening. It happens at work and at home. It's not the router or wifi as other peoples computer are ok. It's something to do with the software (or hardware) on my computer. I also have a similar experience with my fully updated iPhone 5s.

It's driving me nuts. Apple, you're fab but you need to fix this quick. Macs are not supposed to be a pain and this is not good as so many people seem to have this problem. If the press get this, it will not be good PR.

Thnx

Assigning manual IP (Not DHCP) for Airport network interface, and assigning this same fixed IP on the router side seems to fix the issue. I have also set IPV6 for link-local only, but I do not know if that contributes, since that setting alone did not solve the connection dropouts issue for me. Testing with macbook pro with ac airport extreme card and Apple Time Capsule ac router.

Card Type: AirPort Extreme  (0

Not specifically to you, Alex, but you may be affected as well. And you are maybe the first knowledgeable user I'm asking this question to.

Hi all, today it has come to my attention that with some Macs, Yosemite's Discoveryd acts as a genuine memory hog. With other Macs, it does not. The reason is unclear to me, but I am trying to correlate this memory hogging to the WiFi issue here.

Suspicion is, Macs with "Disoveryd" memory hogging will also have WiFi issues. Macs without, will not.

http://apple.stackexchange.com/questions/179236/discoveryd-launchservicesd-huge- memory-consumption

Would all affected here please check their Activity Monitor to see if the PID (process id) "Discoveryd" is hogging their ram? This question to my knowledge (and I've been reading it from its inception) has never come up in this monster thread, so it would be interesting to see if this symptom is a common factor to the issue at hand.

If RAM hogging is indeed discovered, would anyone be so uncouth as to force quit Discoveryd by means of the red "Stop" sign in Activity Monitor? See if WiFi improves? The PID will rebuild itself again, rest assured. I hope this may prove a very valuable experiment.

Thank you all!

My router assigns an ip to almost all devices in my network. This was to get around another where the same beta started to clone devices in my devices list. started out as one of my devices was listed 14 times after a couple of days and I was getting messages on this mac that another device was using my IP... I found no such device but itself. All this went away when I fed the router the network addresses and assigned an IP. Suppose I should see what this iMac does if I remove it from the list. I haven't yet tried switching iMac from dhcp to manual to that IP. I will try it.

My discoveryd is using 14/15mb regardless of the wifi being on or off. Wifi seems to be ok at the moment so I'll try later. Bit sick right now anyway.

my discoveryd is using very little memory at 21 Mb now. But since I set manual fixed IP, I haven't had any wi-fi dropouts at all. Second day running and counting.

same issues here please let me know how you fix

I do not claim this fix will work for everyone, but it is working for me on my iMac (no issues whatsoever on my MacBook Pro).

1. Open terminal

2. Type in this line: ping -i30.0 XX.XXX.XXX.XXX

3. Let it run (minimize to conserve desktop space)

Note: Replace XX.XXX.XXX.XXX with YOUR IP address (not the IP address assigned by your router, but your IP address assigned by your ISP).

Determining IP Address

Open terminal then paste in this command:

ifconfig | grep "inet " | grep -v 127.0.0.1

Other options:

http://www.wikihow.com/Find-Your-IP-Address-on-a-Mac

Like I said, this has worked for me and it is an easy thing to try.

Here are the steps that worked for me.   I worked with an Apple senior advisor for over a month before he had me try this, and I was amazed that it actually worked.

Things that you will need.

1. A copy of the 10.10.3 Yosemite Installer.

2. An external drive that you can boot from that has a copy of either Data Backup or Carbon Copy Cloner on it.

3. An external drive to Backup your Mac (This is for safety reasons)

Here are the steps:

1. Make sure that you have a backup of your hard drive for safety reasons.

2. Add a partition to your hard drive.  (You can use Boot Camp Assistant, Disk Utility, or a third party utility for this.

3. Install OS X 10.10.3 on the clean partition that you created.

4. Boot from the new partition and verify that you have no issues with your WiFi.

5. Reboot your Mac starting it from an external drive.

6. In the Finder, Get Info on the new partition and set it to Ignore Permissions.

7. Delete the Users and the Applications folders on the new partition. 

6. Using a Backup application (I Used Data backup) Clone the new partition to the old partition.  Make sure that you have the software set to leave anything on the destination in place that is not on the source.

Once this is done, you can reboot to your original partition and your WiFi should be working.   I did this 2 weeks ago and have not had any issues since then.

Notes: You have to do the clean install on an internal partition, when we tried this on an external I had the same issues.  This doesn't make sense, but it made a difference.

This is somehow implying that a clean install fixes the issues. But I had issues right after clean install (with full drive formatting), with no third-party apps added.

I did as well with earlier clean installs that Apple had me do with 10.10.2.  This was the 1st time I did a clean install of 10.10.3. And the advisor insisted that I do this on the internal drive and not a drive connected via USB.

My guess is that its not a file that is installed by the OS, but rather a preference file or something else that is created when you setup the OS that gets replaced that fixes the issue.

All I know is that I did this 2 weeks ago and have not had any issues with Wi-Fi since then.

Hello, I checked for the latest Apple Yosemite updates.   Not sure if this is the Real fix but I downloaded/installed the Thunderbolt Firmware Update ver 1.2 and my wifi issues miraculously disappeared.  I think there was more in the update then Thunderbolt   Hope this resolves everyone else's issues as it did for me.