Q: 10.10.1 update killed my wifi!!

Hi ..

Oddly enough the update is supposed to improve Wi-Fi reliability. I'm on Yosemite v10.10.1 without any wi-fi issues.

Have you deleted network preferences yet? Preferences can become corrupted after an update.

Open the Finder. From the Finder menu bar click Go > Go to Folder

Type or copy paste the following:

/Library/Preferences/SystemConfiguration

Click Go then move all the files in the SystemConfiguration folder to the Trash.

Restart your Mac.

See if that makes a difference.

Your Mac will generate a new SystemConfiguration folder for you.

If that doesn’t help, try here >  Wi-Fi: How to troubleshoot Wi-Fi connectivity

If nothing above helps, restart your internet modem and router.

Apple is becoming a BIG JOKE!  My wifi is terrible after Yosemite update and 10.10.1 did NOTHING!!!!

This affects my Clear modem connection mostly... it will not stay connected.  Clicking on a link in the browser seems to kick it off.  It drops the connection and reconnects constantly.  Other wifi networks stay connected.  But they are much slower on my MBA 2013 compared to my iPhone and iPad.

WHAT IS THE DEAL APPLE... You guys need to fix this ASAP!!!!!  I've never seen such a wide spread issues go ignored by Apple for so long.

This is indeed a big joke!! I can't even update because the connection doesn't stay alive even for a couple of minutes!!!

Thank you very much Apple, after having immense problems with sudden freezes on two brand new retina mbp's, now this!!

UPDATE: Solved Wifi issue with MBA 2013... so far!

Hardware:

MBA 2013

Clearwire Clear Spot 4G Apollo

ISSUE: after Yosemite update (and 10.10.1 update) wifi connection continuously dropped and reconnected.  No issues before Yosemite.

I was able to test using several wifi networks, which other than being a little slower than expected, all worked with no connecting issues.

Attempted fixes: All the standard ones found in this forum and other places (ie. delete network settings and preferences.  Delete and recreate wifi network with new name... the list goes on.)  Some very temporarily seemed to solve the issue... only to see it return after a few quick surfing sessions.

SOLVE: (at least for now... I'll update this every 24 hours for the next few days)

While in an in-depth conversation with high level Apple tech Scott... I learned that deleting the wifi preferences and settings files wasn't all the files related to wifi connection.  Keychain holds the wifi passwords.

I then changed the settings in my modem to not require a password.  It connected after asking me "this network previously was protected by a password.  Are you sure you want to join it?"  (or something along those lines)  I agreed and was connected without any drop offs... Yah!!!

After a few hours of success, I changed it to WPA2 passworded (same question box popped up, I agreed)... connect with no issues... Yah again!!!

AFTER 24 HOURS:  Still successfully connected!!!

NOTE:  I believe this issue is caused by a corrupted keychain entry.  Apples help forum shows other high level network techs have notice this issue too.

I'm assuming that just deleting the keychain related to this wifi connection would accomplish the same results.  You would just need to re-enter the wifi password.

Watch for updates every 24 hours for the next few days... any feedback would be great.  Let me know if this helped your issue.

48 hours and counting... still working great!!!