Yosemite (OS X 10.10) killed my WiFi :(

Its only happening in two places and both worked fine before I updated to Yosemite, I even tried with a VPN and it still drops the connection,

I've tried every idea here except reinstalling Yosemite (no wifi to do so???). I still can't connect to my school's wifi. It connects everywhere else, but not school. The school's wifi is WPA Personal, but the only options I'm given are WPA/WPA2 Personal. I'm not sure if that makes a difference or not. I updated to Yosemite last Sunday, and it worked fine until Thursday morning. Each time I enter the wifi password and click connect, it says connection timed out. I've read about the 5gz/2.4ghz thing, but I don't know where to find that. coul someone help me with that?

Hi All,

I have late 2013 15" rMBP and was unable to make a consistent 5 GHz WiFi connection with Yosemite. I followed the following instructions:

• Copy and paste these instructions, because you'll be disconnected from the Internet and you'll need to reboot.
• Go into your Network Preferences > Select Wi-Fi Service (in the list in the left column) > Click on the options (cog icon) > Select "Make Service Inactive" > Select Apply.
• Select the same Wi-Fi Service > Delete It ( – ). Reboot.
• Return to Network Preferences > Create a New Service ( + ).
• Inside the prompt select Wi-Fi under Interface, name the Service Name something other than Wi-Fi. (I named mine Wi-Fi2. Apparently if you retain the previous Wi-Fi name the WiFi dropping will return on reboot.) > Click Create.
• Click Apply.

This appears to have worked and I now have 5 GHz connection. However, my WiFi icon is greyed out with an x in middle (Attachment 1). From the WiFi pull down menu it shows what WiFi connections are available. But it also states the Wi-Fi is not configured and I am unable to toggle WiFi on/off (Attachment 2).

How do I restore the WiFi icon functionality after having performed the above procedure?

Cheers,

Don

Hi All,

In regards to my previous post regarding lost functionality of the WiFi Icon. After waiting 30 minutes, the functionality seems to have recovered on its own.

Cheers,

Don

Wasn't having issues with my 5ghz connection, upgraded to Yosemite, now connections to 5ghz networks fail...

Hi All,

Followed the instructions as described in my previous post and 5 GHz connectivity appeared to be restored. However, after waking up the computer from it's overnight sleep the 5 GHz connectivity was lost. Rebooting restored. But for how long?

Don

We are still having a lot of problems with 802.1x ELP-TLS type connections, the certificates are fine as when we reboot back to Mavericks they work, but under Yosemite they are failing with this showing up:

10/29/14 12:44:15.517 PM WiFiAgent[368]: [EAPOLControl.c:180] EAPOLControlAuthInfoIsValid(): Ignoring SaveCredentialsOnSuccessfulAuthentication since no credentials were specified

10/29/14 12:44:15.529 PM eapolclient[1032]: en0 START uid 501 gid 20

10/29/14 12:44:26.206 PM eapolclient[1032]: en0 EAP-TLS: authentication failed with status 1

10/29/14 12:44:31.151 PM eapolclient[1032]: en0: user cancelled

10/29/14 12:44:31.153 PM eapolclient[1032]: en0 STOP

We have tried various things (turning off Bluetooth, deleting the various plists, deleting and re-adding the network connection, deleting and re-adding wi-fi, setting the certficates to any/all access, etc.), basically nothing has worked so far. Seems most likely a bug. Wish Apple would put out a fix.

Anyone have any understanding of what eapolclient status 1 is?

Did you report this to bugreport.apple.com?

You have pretty good details for Apple to start search for solution.

This worked for me after a discussion with Apple care

Intel-based Macs: Resetting the System Management Controller (SMC)

Worked for me for a day. Today same problem: bye bye wifi.

Aargh, it's just gone again, lasted a few hours... :-(

Not happy

My latest updates regarding how I fixed (so far) this issue:

I just did all the steps above (see JamieAscot's comment) and I assume that having WiFi with another name (like WiFi2) was my missing key because I had done this several times both before migrating to Yosemite and after that except having newly created WiFi with another name!

My WiFi connection was dropping almost every minute and now it has been working fine without disconnecting for almost three hours.

For those who suspect router settings or access points I think this is specificly Mac-related issue and hope Apple attempts a serious action on fixing that.

Did this 2 days ago. Still working normally again after constant wifi dropouts.

1: Remove Network Configuration & Preference Files

Manually trashing the network plist files should be your first line of troubleshooting. This is one of those tricks that consistently resolves even the most stubborn wireless problems on Macs of nearly any OS X version. This is particularly effective for Macs who updated to Yosemite that may have a corrupt or dysfunctional preference file mucking things up:

/Library/Preferences/SystemConfiguration/

com.apple.airport.preferences.plist

com.apple.network.identification.plist
com.apple.wifi.message-tracer.plist

NetworkInterfaces.plist

preferences.plist

1. Move all of these files into a folder on your Desktop called ‘wifi backups’ or something similar – we’re backing these up just in case you break something but if you regularly backup your Mac you can just delete the files instead since you could restore from Time Machine if need be
2. Reboot the Mac
3. Turn ON WI-Fi from the wireless network menu again

This forces OS X to recreate all network configuration files. This alone may resolve your problems, but if you’re continuing to have trouble we recommend following through with the second step which means using some custom network settings.

Hi Ron,

Tried your suggestion again of deleting the 4 of the 5 files you suggested and rebooted. There is no "
com.apple.network.identification.plist" to delete. Initially, I was able to connect to the 5GHz band. Moments later, the WiFi disconnected and I was forced to resort to the the 2.4 GHz band. This suggestion did not work for me.

All, I have closely read this thread. Some claim that they have no issues while others claim they major connection problems. I wonder how many of these individuals that claim they have no problems are because they not attempting a wireless AC connection on a 5 GHz band.

To Apple. This problem with Yosemite and 5 GHz connections has gone on long enough. Like many others I have submitted a bug report. It would be great if Apple at least acknowledged they had a problem and publicly responded. At a minimum they should be respond to the bug report and say they are working on this problem.

Don Barar

I haven't been able to get a connection to my 802.11ac network since upgrading to Mac OS X Yosemite. If I run Mac OS X Mavericks or Linux I have *no problems whatsoever*, but I cannot get Yosemite to associate to the network:

Nov 1 18:37:22 Twoflower kernel[0]: ARPT: 670.212012: MacAuthEvent en0 Auth result for: 6c:70:9f:df:d8:0b MAC AUTH succeeded

Nov 1 18:37:22 Twoflower kernel[0]: AirPort: Link Up on en0

Nov 1 18:37:22 Twoflower kernel[0]: en0: BSSID changed to 6c:70:9f:df:d8:0b

Nov 1 18:37:22 Twoflower kernel[0]: en0::IO80211Interface::postMessage bssid changed

Nov 1 18:37:22 Twoflower kernel[0]: en0: 802.11d country code set to 'US'.

Nov 1 18:37:22 Twoflower kernel[0]: en0: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165

Nov 1 18:37:32 Twoflower kernel[0]: AirPort: Link Down on en0. Reason 8 (Disassociated because station leaving).

Nov 1 18:37:32 Twoflower kernel[0]: en0::IO80211Interface::postMessage bssid changed

Nov 1 18:37:32 Twoflower kernel[0]: en0: 802.11d country code set to 'X0'.

Nov 1 18:37:32 Twoflower kernel[0]: en0: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165

Nov 1 18:37:32 Twoflower kernel[0]: ARPT: 680.720904: MacAuthEvent en0 Auth result for: 6c:70:9f:df:d8:0b MAC AUTH succeeded

Nov 1 18:37:32 Twoflower kernel[0]: AirPort: Link Up on en0

Nov 1 18:37:32 Twoflower kernel[0]: en0: BSSID changed to 6c:70:9f:df:d8:0b

Nov 1 18:37:32 Twoflower kernel[0]: en0::IO80211Interface::postMessage bssid changed

Nov 1 18:37:32 Twoflower kernel[0]: en0: 802.11d country code set to 'US'.

Nov 1 18:37:32 Twoflower kernel[0]: en0: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165

Nov 1 18:37:42 Twoflower kernel[0]: AirPort: Link Down on en0. Reason 8 (Disassociated because station leaving).

Nov 1 18:37:42 Twoflower kernel[0]: en0::IO80211Interface::postMessage bssid changed

Nov 1 18:37:42 Twoflower kernel[0]: en0: 802.11d country code set to 'X0'.

Nov 1 18:37:42 Twoflower kernel[0]: en0: Supported channels 1 2 3 4 5 6 7 8 9 10 11 12 13 36 40 44 48 52 56 60 64 100 104 108 112 116 120 124 128 132 136 140 144 149 153 157 161 165

Nov 1 18:37:42 Twoflower kernel[0]: IO80211AWDLPeerManager::setAwdlOperatingMode Setting the AWDL operation mode from SUSPENDED to AUTO

Nov 1 18:37:42 Twoflower kernel[0]: IO80211AWDLPeerManager::setAwdlAutoMode Resuming AWDL