From looking at the sites Apple tried to be clever and designed a new pop up box for entering network details(wireless credentials) especially on public networks. This is suppose to take the emphasis away from thebrowser. However, in reality the box doesn't pop up and the browser does not re-direct!
Open Keychain Access. It's in Applications=>Utilities.
Then in the Keychain Access menu at the top of the screen choose "Preferences..."
Go to the pane labelled "certificates." Check the first two items there. (Online Certificate Status Protocol and Certificate Revocation List). Both should "Off." If they say "best effort" change them to "Off." Then you should be able to connect (may need to restart the computer, but maybe not).
Thank you, all! I am able to connect my Macbook Pro to wireless router sometimes. That's an improvement. Each day, I have to restart the wireless router and the Macbook to keep the connection. I do not have to do this with my Tower which is running Leopard. I still have no connection between my I-Phone and my wireless router. It appears as if I am connected, but in actuality I am not.
Had the same issue on a 2009 MacBook Pro after I upgraded to OS X Lion. Called Apple Support. They chalked it up to a corruption when upgrading. Had me:
1) trash the '/Library/Preferences/SystemConfiguration' folder
2) empty the Trash
3) shutdown the computer and leave shutdown for 30 seconds
4) startup the computer and select my network from Airport
5) put the computer to sleep, wait 30 seconds
6) wake the computer and ensure that Airport had established a connection to the network and set my network as the preferred network (as it had)
Hope this helps.
Thanks! Worked for me.
Had the same problem ...
I have found a work around
1-Turn off the bluetooth
2-Put the computer the sleep using the apple menu and the command sleep
3-Wake up the computer and see if it connect automatically on the wifi network, is it does try this
4-You need to put the bluetooth on again and remove all your bluetooth devices sync with your macbook
5-Click on your bluetooth menuin the right corner and select "open bluetooth preferences"
6-In your devices list remove all of them by selecting your device and using the minus sing in the bottom of the window ( - )
7-Repeat that for all devices
8-Turn off the Bluetooth again, put the macbook to sleep wait a few seconds and wake up,
9-See if the Wifi connection connect automatically (if it does, you are on the right track)
10-Turn on the Bluetooth and repair all your Bluetooth devices with your macbook
This procedure work for me,
Proxymap (Macbook air 2011,Mac os X 10.7.2)
Similar issue for me. New iMac, Lion 10.7.2, wi fi doesn't work after sleep (roughly one in three times) But - the system preferences>network dialogue reports it is connected. In that dialogue, turn off, wait a few seconds, turn it on - and it reconnects, ususally but not always. Spent hours on this with tech help line. No better. I've tried changing the router from auto to set channels, have preffered networks with just one entry, changed dns from hubs own to bt's dns server. None of these solve it. At the same time, iphone, and two notebook PC's still have no trouble connecting with wifi. Updated router firmware too.
Just about half an hour ago, I took some detailed notes. After third sleep, wifi was OK but just for one single web search, then dropped.
A quick browse around forums shows other Lion issues. I suffer several of them, including the mail losing connection to outgoing server - even when wifi is fine.
Hope Apple come up with a fix soon!
Could be a light at the end of the tunnel. Great chat with tech support. Confirmed it is a Lion known issue. Also ran some simple one liners in terminal, to log the data on the iMac as it failed again. (Three sleeps and failed as usual) Then emailed that log to the tech folk. Hopefully they will be able to work something out that is possible to go in an update / fix.
In the meantime, I've bought an ethernet cat 5 cable.
I'm getting ready to go buy an ethernet cable. Each time my Macbook goes into sleep mode, I have no signal and cannot recover a wifi signal. I find that if I cold-boot the wireless router, I am able to access the signal. The signal comes and goes, though. I pay for cable 60 mbps, so it should not be dropping a signal, and this is a new router. My I Phone as well comes and goes with wifi connection since I updated to Cloud. Apple, it is time for an update to fix these issues! How embarrassing it should be to release a problem with issues.
This exact same thing happened to me after I upgraded fromSnow Leopard (v10.6.8) to Lion 10.7.2.
My Snow Leopard-running MacBook had been connectingautomatically from sleep with my ATT WIRE2 router for 6 months. After upgradingto Lion, my preferred network wouldn’t connect without my reselecting of it inthe list of available networks even though in WAS already in my PreferredNetworks list. The network would connect successfully then with nothing more requiredfrom me.
Another Lion-running MacBook in my house DID loginautomatically to our router so the router was clearly not the problem.
When I compared the Preferred Network list between the twolaptops, the WIRE2 network name was identical but the security protocol was different.
The laptop that connected automatically showed WPA Personal securityprotocol and the laptop that failed every time (the laptop I’d recentlyupgraded from Snow Leopard) showed WEP security protocol.
By the way, my ATT 2WIRE router configuration paperworkdesignated WEP as the required security protocol for my router. (Yep thesuccessfully-connecting MacBook was apparently misconfigured.)
---deleted the errant computer’s 2WIRE network from mypreferred list,
---clicked + to Add a new Wi-Fi network,
---used the same network name for a new preferred network
---but use the WPA Personal security protocol with the ATT2WIRE paperwork’s WEP password
the setup works.
When I close my newly upgraded Lion-running MacBook and itgoes to sleep, when I open it back up airport automatically connects to mywireless network every time.
The fix persists through a router reset and rebooting myMacBook.
I hope this helps someone.
I did all of the above and connectivity is still erratic. I have accepted that I have to reboot my router each time I want wifi connectivity on the computer with Lion installed. My computer running Leopard is fine. Any photographers out there, do not upgrade to Lightroom 3.6. It will not work with Lion, yet works fine with Snow Leopard. With Lion, it freezes and crashes.
My daughter's new iMac came with Lion pre-installed. The wi-fi worked fine until a few days ago, after I had to fiddle with her bluetooth options. When she rebooted the computer would hang while searching for a wireless keyboard, not recognizing that there is a USB keyboard attached. I turned off the auto-search for a wireless keyboard, which helped with the original issue, and her wi-fi connection started dropping every time the computer went to sleep. She has to turn it off and back on again for it to be recognized.
I encountered the same problem after I updated to Lion 10.7.3. Everytime I wake up the computer, it cannot automatically connect to my wireless network. I have to manually select my network to connect. My network is on an AiportExtreme.
I did not have this problem when using Lion 10.7.2. I tried the fixes suggested by dnscimb but they don't work.
My computer is a 2011 iMac.