No wifi connection after installing Mountain Lion HELP!!

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Level 1

4 points

No wifi connection after installing Mountain Lion HELP!!

So there it is... It appears as though I am connected to the wifi network, but in reality there is no connection and I'm offline. That's the only way I connect to the Internet so I'm kind of screwed. Any ideas on how to fix this? Here's what I've tried so far:

-disconnect and reboot the router

-turn off and on the AirPort

-delete and add the network connection

-restart the computer

Nothing works :-(

I have a late 2011 17" MBP if that makes any difference.

MacBook Pro, OS X Mountain Lion

Posted on Jul 25, 2012 3:07 PM

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Answer 1

Shootist007

Level 6

16,703 points

Jul 25, 2012 3:19 PM in response to katk23

There has been other report of this after upgrading to Mountain Lion.

One fix is to Reinstall ML right over the top of the current install. But you will need an Internet connection to do that. Try booting to the Recovery HD partition. At startup hold down the Command+r keys from the screen that comes up select Reinstall OS X.

If that system can't connect to the internet through your wireless connection then you are going to have to connect your Mac to your router with an Ethernet cable. Your Mac does have an Ethernet networking port and so does your router so all you need it the network cable.

I suggest you do that anyway just incase your WiFi link goes down for some reason.

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Answer 2

katk23 Author

Level 1

4 points

Jul 25, 2012 3:26 PM in response to Shootist007

Thank you so much for the advise! I am reinstalling the OS as we speak! I'll post up the results as soon as it is all done!

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Answer 3

Shootist007

Level 6

16,703 points

Jul 25, 2012 3:31 PM in response to katk23

Well I didn't mention this before but hopefully the first install of ML changed your Recovery HD partition to download ML and Not Lion.

Good Luck, Hope all goes well for you.

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Answer 4

katk23 Author

Level 1

4 points

Jul 25, 2012 3:34 PM in response to Shootist007

I believe it did. ML is done installing and is rebooting right now- gosh lets hope this is IT!:-)

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Answer 5

katk23 Author

Level 1

4 points

Jul 25, 2012 3:35 PM in response to katk23

It's installing right now - is what I meant to say:-)

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Answer 6

Jul 26, 2012 1:33 AM in response to katk23

did it help?

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Answer 7

Moma79

Level 1

0 points

Jul 26, 2012 2:49 AM in response to katk23

Im having the same problem 😟 It seems to be connected to the router but when i try to open a page nothing is happening. Im reinstalling it right now with the ethernetcable the way Shootist007 described. Lets hope it helps

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Answer 8

Moma79

Level 1

0 points

Jul 26, 2012 3:20 AM in response to katk23

It didn't work 😟 This ***** big time. Does anybody else have an idea? Everything else seems to work on wifi, my ipad, my iphone and my windows laptop. Except my macbook after installing ML.

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Answer 9

katk23 Author

Level 1

4 points

Jul 26, 2012 5:09 AM in response to Moma79

Well folks - did the complete reinstall and nothing. Got wifi for literally 5 seconds and then nothing. Everything appears to be fine. I am connected, max connection bars, I have the IP address.... What the heck?! I hope apple will fix this thing soon:-( I'm stuck w/o functioning computer:-(

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Answer 10

katk23 Author

Level 1

4 points

Jul 26, 2012 5:13 AM in response to katk23

Omg I FIGURED IT OUT!!!!! Mountain Lion does not support VPN! I use it from Europe to watch shows on Comcast - well when I switch it off - I get connected right away - wifi works. If I turn on the VPN my wifi drops!

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Answer 11

Jul 26, 2012 5:20 AM in response to katk23

How did you turn VPN off?

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Answer 12

Shootist007

Level 6

16,703 points

Jul 26, 2012 5:26 AM in response to katk23

It's not really the VPN it is that the VPN isn't really connecting to anything. No connection to another end point VPN no internet browsing.

ML has to in some way support VPN connections. Otherwise no company would allow them to be used to access the corp servers of some companies.

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Answer 13

Jul 26, 2012 5:28 AM in response to Shootist007

so what are you saying exactly? How would you fix the issue? I am kind of deparate here... this I think is one big Apple blooper and I don't like it.

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Answer 14

katk23 Author

Level 1

4 points

Jul 26, 2012 5:33 AM in response to Shootist007

@dennis4jx - I am using a third party VPN service that changes the IP address of my computer - just so I can watch the US based content online while I am overseas. It's not a built-in thing that you have on or off on your computer.

@Shootist007 - I am not sure what to make of this. I checked the VPN connection as a desperate move to see whether this is preventing me from getting the wifi connection. Sure enough as soon as I disconnected from HMA Pro VPN - My Internet came back to life. I tried it multiple times just to make sure. Now I am not certain of what to do next... Do I have to change something in the Network Connections? Like change the DNS settings to Open DNS? And if so - where do I do that?

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Answer 15

Shootist007

Level 6

16,703 points

Jul 26, 2012 5:46 AM in response to katk23

Not sure what you have to do but whatever that may be it has to be done in the VPN software.

Something in ML, or with installing ML over Lion, has broken the VPN connection to whatever server it was connecting to to allow you to access USA content. It's not just a change of the IP address. Your IP was changed by making a connection to a USA VPN server like a Proxy Server. All that was change was the IP address USA content saw.

Once that VPN (Proxy Server) connection was broken you could not surf the net at all.

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