Apple Event: May 7th at 7 am PT
Upgraded to Mavericks last night. Since then, no internet connection. iMac connects to the right AP but shows an exclamation point.
Wifi was working before the install and the other Macs with previous versions of OS X are connecting fine with the same AP.
Anyone had a similar problem? Any ideas what could be wrong?
Thanks!
iMac (27-inch Mid 2011)
Just did the change of wireless setting you recommanded. Still no result
Same problem here, late 2008 macbook model. Pretty serious problem I think!
yes i did, and didn't work! difficult one :-(
Check if it works in Recovery Mode so we can isolate any hardware issues. Reboot > hold command + r > then once in recovery try to connect to your AP and open the help page see if you are able to go online.
Wifi works when I go in the Recovery mode and search through the help pages.
What does that mean?
Good sign, this would isolate the issue to software. At this point I would recommend moving /Library/Preferences/com.apple.network.eapolclient.configuration.plist and NetworkInterfaces.plist to the desktop > logout/login > then to go System Preferences > Network > plus sign to add WiFi interface if missing > Apply > try to reconnect.
Just did the procedure. Still not working
I upgraded to mavericks Oct. 22nd. Since then, my wifi hasn't worked. Hoping there's a bug fix soon, or there's some other fix that you guys figured out. I'm connected directly through ethernet right now.
On my wifi, it has an exclamation point, it sees my wireless network but still no connection
So far nothing has worked for me. but ready to try anything new
Similar problem here. 21.5" late 2012 iMac updated to Mavericks last night. Everything seems fine except for the WiFi connection. I have the Mac hooked up to a BT Home Hub 4 by ethernet, and have Wi Fi running as well to connect to wireless printer and other devices. I have the exclamation mark over the greyed out bands and System Prefs/Network reports that WiFi has a self assigned IP address and will not be able to connect to the internet. I've rebooted the hub, and deleted/reinstalled the WiFi network through Network Preferences. No change. WiFi is working though, as I can print to the wireless printer. Curiously, if I search for a network, the Home Hub 4 network doesn't show up, although I can see my neighbour's Hub 3 network.
Logging on to the Hub shows that the 2.4GHz network is being used by my iPad, iPhones and Airport Expresses, but nothing is using the 5Ghz network, The iMac's WiFi MAC address is not listed as being on either wireless network (but it is connected via ethernet and shows up in the list), but still seems able to connect to the printer via WiFi.
Any suggestions?
Edit:
Just looked at the TCP/IP pane of the WiFi advanced settings, and there is no IP address listed adjacent to "Router". Clearly the iMac is not seeing the router through the software, but is still able to connect to the network somehow.
Message was edited by: Roger Green
This worked for me.
wifiguru wrote:
Backup these 2 files:
/Library/Preferences/SystemConfiguration/NetworkInterfaces.plist
/Library/Preferences/SystemConfiguration/preferences.plist
Then delete these 2 files and reboot. If you upload these 2 files someplace I can take a look if something was wrong in there.
Thanks wifiguru
I'm having the same problem on my 2008 Pro tower. I have tried all of the above solutions and the ! point is still there. I am however able to use the internet via a wifi connection to a hotspot created by my iphone.
The wifi password type is WPA2 Personal on the network that I can see and login to, but it does not get any router/subnet/dhcp lease info.
Same problem also. Macbook Pro Retina. I can see exclamation mark from time to time. Reset NVRAM yesterday and it helped but today happened again.
Well, it did work briefly, but now I'm back to the exclamation mark. Oh well.
I've sent a feedback to Apple. Have you ?
It is a software bug and apple need to fix it.
Message was edited by: Alexey Lysak
Mavericks upgrade wifi problem exclamation mark
