Change your router channel. Sometimes this is all you will have to do.
Power cycling the router. Read the router's user manual or contact their tech support for instructions.
System Preferences/Internet & Network/Network
Unlock the padlock
Click the Assist Me button
In the popup window click the Diagnostic button.
System Preferences/Network- Unlock padlock. Highlight Airport. Network Name-select your name. Click on the Advanced button. Airport/Preferred Networks-delete all that is not your network.
Place a check mark next to "Remember networks this computer has joined." Click the OK button and lock the padlock. Restart your computer.
http://support.apple.com/kb/TS1920 Mac OS: How to release and renew a DHCP lease
No internet connection (wireless)
Check to see if an extra entry is present in the DNS Tab for your wireless connection (System Preferences/Network/Airport/Advanced/DNS).
Delete all extra entries that you find.
Place a check mark next to "Remember networks this computer has joined."
Other resources to check into:
I bought my first Macbook pro 13" with Lion yesterday.Was pretty excited about it, because I had saved for so many months to get this machine.
But when I tried to connect it to the WIFI (2wire Router from ATT) I just would not get connected. I tried for 2 hours but in vain.
Tried for the whole day today SADLY very frustrated now. With so much Hype and being so pricy, plus with so much focus on moving towards the cloud and all, I though getting online should be a peice of cake. Anyway.. Please suggest a solution. I have tried everything suggested in this forum. I am scared to delete any files though.
I am posting this message from my PC ha ha..
I have tried everything suggested in this forum. I am scared to delete any files though.
I am posting this message from my PC ha ha..
Then there is nothing more to add from anyone.
I bought my first Macbook pro 13" with Lion yesterday.
Call Apple Care. You have 14 days from the date of purchase to return your computer with no questions asked.
Take FULL advantage of your warranty. Posting on a message board should be done as a last resort and if you are out of warranty or Apple Care has expired.
Still, there is no official word on this ongoing issue since 2007! 5 Years!
I mean it's as simple as a darned wifi connectivity hiccup! Fix it already!
All I see is "Connection timeout" and "Conection Failed" I am two dialogue errors away from smashing my MBP on the wall.. the irony is that I work at home via this thing called the internet!
I had the same problem and after 4 hellish days of messing with router settings, I have finally figured it out, and came back to this thread to share! I searched here (and everywhere else on the internet) yesterday for an answer, but although the information I found led to the fix, nowhere did I find what was, for me, the vital missing piece of information.
I have a factory reconditioned MacBook Pro that I purchased from the Apple site. It came running Snow Leopard, and I upgraded to Lion as part of my ridiculous quest to connect to wifi at home. Turns out Lion wasn't necessary, but nonetheless, I guess it's nice to have the upgrade. I have Uverse internet with AT&T, and we are using the 2Wire router that came with the system. It has worked with our other apple products and pc laptops at default settings no problem. The MacBook wouldn't connect.
I think MacBook likes WPA2-PSK security for some reason. We were set on WEP. So, go to this address - 192.168.1.254
That will take you to the 2Wire settings site. On the tabs across the top, click "Settings." Then click the "LAN" tab. Go down to the subheading "Security." By Authentication Type, drop-down menu to WPA2-PSK (AES). Then go to the bottom of the page and click Save. Now for the small detail no one has mentioned in my four days of searching for an answer. When your Airport recognizes the network and you select it, it will prompt you for a password. It is not the number you were using for your WEP security. For us, that was a 10 digit number called router access address. For WPA2-PSK, the password is the SSID #. I had to reset all the other devices running on the network with the same new password, and now we are all running on the network again. Thank the lord!!! Hope this helps save some poor souls from the hours of frustration I have just been through!
This is more for people searching on a similar issue.
My 2011 MacBook Air would connect to the work WiFi and network diagnostics showed green all the way. I could Ping as well.
I tried all the solutions offered up mainly setting up a new location and messing with DHCP. Nothing worked.
My iPhone could connect but the mac couldn't.
Here was my fix.
Open System Preferances.
go to TCP/IP tab
Select 'Using DHCP with manual Address' from drop down.
Type in an IP address you assume to be free.
My aging work router that I don't have access to was sharing out IP addresses, so I picked one for myself with a high number.
hope this helps.