Currently Being ModeratedAug 9, 2012 6:43 PM (in response to nicoladie)
Try turning the modem off for about 5 minutes then turn it back on.
If that doesn't help, Start up in Safe
A Safe Mode boot takes longer than a normal boot so be patient. Once you see the Desktop, click the Apple menu icon top left in your screen. From the drop down menu click Restart.
See if that made a difference...
If not, open the Finder. From the Finder menu bar click Go > Go to Folder
Type this exactly as you see it here: /Library/Preferences/SystemConfiguration
Click Go then move the com.apple.airport.preferences.plist file from the SystemConfiguration folder to the Trash.
Restart your Mac.
Currently Being ModeratedAug 9, 2012 7:29 PM (in response to Carolyn Samit)
The problem lies with MacPro. Safari has no problem with iMac. Last time, in the previous version of Safari with exactly the same problem, Apple fixed the bug by firmware update on MacPro.
It does not have anything to do with the wireless modem, because it works fine with my home wifi modem. The problem lies with the authentication auto-join before the host returns back a valid IP logging into a public wifi, such as Starbucks, and any other public wifi that requires a log-in for authentication.
The airportd deamon basically does not detect auto-join, and keeps waiting for a valid IP. Since you never even gets a chance to authenticate with the host wifi because there is not log-in pop-up window that re-directs to the authentication page, it stalls. Firefox can detect it, and display the log in page, but Safari does not.
Even if you authenticate using Firefox, if you time out, such as putting MacPro to sleep, when it wakes up, it lose the wifi connection, because the host wifi timed out and require re-authentication again. Stupid Safari still thought it was connected to a valid IP, but in fact, the IP was terminated by host wifi, causing the stall.
If Apple can only fix the bug in airportd background deamon in MacPro that detects the auto-join or the drop in wifi IP address, then it would solve the problem. Last time, Apple fixed it with a firmware update on MacPro. But now, the new version of Safari reverts the old bug back.
Safe mode boot won't do anything. SMC reset won't do anything. PRAM reset won't do anything. It is a firmware problem with MacPro only. It works fine with iMac.
Currently Being ModeratedDec 5, 2012 7:00 PM (in response to nicoladie)
this is what is happening with my iPhone 5. I have to reboot the darn thing...not happy I went with iPhone!!!