OK. I have 2 suggestions that you may have already done.
Depending on where your internet connection is made, either router or modem, do you have the dns addresses input manually or to gotten from the service provider. I had problems wiht the default setting of have it provided, so input manually. I've even changed mine to the open DNS servers 126.96.36.199 & 188.8.131.52 which seem to work better that ATT and a little faster internet.
If you're using manuel DCHP settings in the Network preferences, change it to using DCHP and renew lease. I put the router address as the DNS server in the advanced pane sincemy router makes the internet connection to the DNS servers.
Try this solution:
Before proceeding, make sure you have done the following:
- Be sure you are running the latest version of Mac OS X ( get 10.7.2+)
- Apply all available system and software updates available to your Mac from Apple menu > Software Update
- Reset the WiFi Router
After you’re positive you’re on the newest version of OS X and have all software updates applied to the Mac in question, proceed with the solution:
Add a New Network Location & Renew DHCP Lease
- Launch “System Preferences” from the Apple menu
- Select the “Network” panel
- Click on the “Location” pull down menu and choose “Edit Locations…”
- Click on the + plus icon to add a new network location, give it a unique name, and click “Done”
- Back at the Network panel with the newly created location selected, click on “Advanced” in the bottom right corner
- Click on the “TCP/IP” tab
- Click on “Renew DHCP Lease” and wait for the numbers on the left to repopulate, then click “OK”
You should now have a stable wireless connection under Mac OS X Lion 10.7.2.
For most users the wifi stability issue was resolved with installing the latest OS X Lion updates, but in some cases is seems that old network connection profiles brought the problem forward for to the newest OS update. You may have to enter the wireless network password again before you can connect to the router, if you don’t know that be sure to find it out from someone who does before troubleshooting with this tip.
That does not work for me. I've done it numerous times on various wi-fi networks I use. On one unsecured network, the wi-fi connection came back automatically as I did other work, but I could not replicate how. Also, at two other locations that are important, and where I cannot influence the router settings (which work for all other user, as far as I can tell), I cannot restore the connection for the life of me. My wi-fi icon shows greyed-out bars with an exclamation point icon through the middle. I am on 10.7.4 now, but have had problems since 10.7.2. Here is some of the crap I get:
5/20/12 5:48:10.513 PM UserEventAgent: CaptiveNetworkSupport:CaptivePublishState:1211 en1 - PreProbe
5/20/12 5:48:10.545 PM configd: network configuration changed.
5/20/12 5:48:17.000 PM kernel: en1: 802.11d country code set to 'US'.
5/20/12 5:48:17.000 PM kernel: en1: Supported channels 1 2 3 4 5 6 7 8 9 10 11 36 40 44 48 52 56 60 64 149 153 157 161 165
5/20/12 5:48:18.000 PM kernel: AirPort: Link Up on en1
5/20/12 5:48:18.000 PM kernel: en1: BSSID changed to 00:23:69:ee:c2:10
5/20/12 5:48:19.596 PM airportd: _doAutoJoin: Already associated to “FREE Knology Hot Spot”. Bailing on auto-join.
5/20/12 5:48:22.511 PM mDNSResponder: mDNS_RegisterInterface: Frequent transitions for interface en1 (FE80:0000:0000:0000:0219:E3FF:FED8:8CA8)
5/20/12 5:48:36.099 PM configd: subnet_route: write routing socket failed, Network is unreachable
5/20/12 5:48:37.717 PM configd: network configuration changed.
5/20/12 5:48:37.744 PM UserEventAgent: CaptiveNetworkSupport:CaptivePublishState:1211 en1 - Probe
5/20/12 5:48:37.753 PM UserEventAgent: CaptiveNetworkSupport:CaptiveStartDetect:2371 starting probe to determine captivity...
5/20/12 5:48:37.753 PM UserEventAgent: CaptiveNetworkSupport:wispr_detect_redirect_async:424 user-agent:"CaptiveNetworkSupport-173 wispr" url:"http://www.apple.com/library/test/success.html"
5/20/12 5:48:37.755 PM UserEventAgent: async_http_read_stream:375 kCFStreamEventErrorOccurred kCFErrorDomainCFNetwork/2: The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 2.)
5/20/12 5:48:37.755 PM UserEventAgent: CaptiveNetworkSupport:wispr_detect_http_done:196 DNS failure - scheduling timer to try again in 0.10 seconds. retryCount=1
5/20/12 5:48:37.857 PM UserEventAgent: async_http_read_stream:375 kCFStreamEventErrorOccurred kCFErrorDomainCFNetwork/2: The operation couldn’t be completed. (kCFErrorDomainCFNetwork error 2.)
5/20/12 5:48:37.857 PM UserEventAgent: CaptiveNetworkSupport:wispr_detect_http_done:196 DNS failure - scheduling timer to try again in 0.10 seconds. retryCount=2
Not sure that makes any difference. Any help is appreciated.
I have basically the same problem. The network I want to connect to, I cannot influence (router etc). DHCP cannot negotiate an IP address nor is the standard gateway set. I don't understand why everything works fine on all other networks I use except this one... Also a bunch of other people (including other mac users) have no problems connecting to this network. Have you solved this problem yet?