After Lion upgrade, having network issues after wake from sleep

After upgrading to Lion from 10.6.8 on my MacBook Pro (15-inch, Early 2011), I am unable to connect to the Internet after the computer wakes from sleep. I should rephrase this - I am able to ping IP's and DNS (DNS servers are present) however none of my apps will connect (Safari, iChat, etc) -> they all indicate the Internet is unavailable. I have two Airport Express's running 7.5.2 extending a WiFi network off an Airport Extreme running 7.5.2. This issue is specific to waking from sleep. Any thoughts or suggestions would be appriciated.

Mac OS X (10.7)

Posted on Jul 20, 2011 8:31 PM

213 replies

laralea

Level 1

0 points

Aug 6, 2012 6:39 AM in response to philjackson

I lost days of productivity with the wifi issue that occurred the moment I upgraded to Moutain Lion - this SOLVED the issue for me after trying many that did not work and I am thrilled (follow in this order exactly):

Go to Network System Preferences and click the Advanced button;
From the Wi-Fi tab, delete all the known networks
Return to the main Network display and delete Wi-Fi from the Services list.
Finally, add a new Wi-Fi service (by clicking the + icon at the bottom of the list section).

Peter N2

Level 1

4 points

Aug 15, 2012 5:53 AM in response to laralea

Nice - making a new network service seemed to work. Thanks

Aug 16, 2012 11:35 AM in response to Peter N2

wrong forum

Message was edited by: SpectreOne3

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After Lion upgrade, having network issues after wake from sleep