Mavericks upgrade wifi problem exclamation mark

I also did a fresh Mavericks install - didn't solve the problem for me! 😟

Sorry to say burnfry, it worked for 24hrs now back to square one, next move could be return MBA to apple!!!

I am also experiecing wifi problems. I have a later 2009 iMac which works great under Mavericks. But my late 2011 MacBook air has a very very slow internet; to the point that some webpage won't load on the first try.

Nothing worked so far. 😟

Thanks. I moved and then deleted those files and restarted.

That seems to have done the trick

Thanks!

Saba

I am also having wifi issues, since I upgraded to Mavericks, the wifi connects for a few seconds and then disconnects for few seconds and then connects again for few seconds, it's a cycle. I am unable to get a continuous connection for even 10 straight seconds before it disconnects again. It is affecting all my downloads and video streaming. The problem is not with my router or internet connection because my sister's macbook (same early 2011) which is running mountain lion is not facing this issue. Apple needs to fix this ASAP. It's extremely annoying.

I had these same problems. They disappeared when I disabled iCloud Keychain.

Same problem with wifi for me, shows it's connected with full signal but keeps dropping anyway ever 1-5 minutes. Tried everything I found on the forums but nothing seemed to help yet.

Noticed now though that if there is not constant traffic like some downloading the wifi works fine. But if I try to download some updates, stream something or similiar the wifi connection drops fast and I have to turn it off and on again to get it back up for few minutes.

I have changed security form WPA2 to WPA and system has been working fine for the past 24hours no dropouts, connection everytime MBA wakes from sleep. Only issue is less protection.

Thanks Gilbnx, this did work for me so far!

Same was happening to me!

Have a mac book pro early 2011 with OSX Mountain Lion which worked fine when connecting wirelessly.

Upgraded to Maverick and had the ! mark issue and couldn't connect.

All I did to fix was move my AP router to a different location away from the windows, about 3 meters inside my office and Bingo!

All good so far.

My iphone 5c picks up the signal now too!

Hope it helps someone.

Try this, worked for me. No dropping of WiFi since.

http://applefansite.com/2012/07/how-to-fix-os-x-mountain-lions-wifi-issues/

Towjr you are the Man everthing seems to be working.

No, that guy in the video is The Man! lol Thanks!😉

TOWjr, thanks for sharing, it's work!!!

Dang, macmark2's suggestion worked for about 2 weeks, then my iMac with Mavericks started dropping internet again. WiFi is connected, but no internet. Tried many, many things that only work temporarily. This is a Mavericks issue and Apple needs to fix it.