After updating to 10.7.3 I am no longer able to connect to the internet.

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After updating to 10.7.3 I am no longer able to connect to the internet.

Updated to 10.7.3 this morning on my Macbook Air (Oct. 2010 model). After restarting, I am no longer able to connect to the internet. I can connect to the router, and pull a valid IP address (sometimes - other times I get an automatic private IP), but I am unable to get to any websites, check email, etc. I am able to ping websites AND visit websites using their IP addresses, but not using their DNS names.

I called Applecare this morning, and the tech walked me through some troubleshooting steps, including:

Rebooting into Repair partition to check connectivity there (same issues, no change)

Deleting and recreating various config files (Networkinterfaces.plist, preferences.plist and com.apple.airport.preferences.plist) (no change)

I've also tried reinstalling the update (both delta and combo), repairing disk permissions and rebooting into safe mode, nether of which has solved the issue.

Also on the network are (Mini, not updated to 10.7.3), a PC, my iPhone and an Apple TV, all of which aren't experiencing any issues. Any ideas?

Thanks.

MacBook Air, Mac OS X (10.7.2)

Posted on Feb 2, 2012 10:36 AM

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Answer 1

wifiguru

Level 2

240 points

Feb 2, 2012 11:29 AM in response to Qtip1423

Do you have the firewall enabled ? Toggle it and see if any setting can get you a valid IP address and if you can get to websites.

Check your DNS settings. USe something like 8.8.8.8 ( Google's DNS) and test if you can get anywhere.

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Answer 2

Feb 2, 2012 11:34 AM in response to Qtip1423

I'm having the EXACT same issue on a 17" MBP 3.06 GhZ C2D. I can pull a valid IP address from work wireless AP or at home on my router(wireless or hardwired) BUT when I try and access anything network related(http, ftp, https, work shares, etc) no dice.

I'm not gonna beat around the bush, this is horrible on apple's part. How did an issue this big sneak by and into a production build? From what I'm reading on here and other forums this update has ALOT of issues, and this no network connectivity appears to be one of the worst...

Should have read up on it first grr. Thankfully I have a TM backup...now to sit patiently for the next 4 hrs...

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Answer 3

Feb 2, 2012 11:35 AM in response to wifiguru

toggling the firewall on off for me does not resolve the issue. just an fyi

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Answer 4

Qtip1423 Author

Level 1

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Feb 2, 2012 11:38 AM in response to wifiguru

Firewall not enabled, never has been. Tried turning it on to see if it would help, but no. Tried changing DNS addresses (using Google and Open DNS), no change. Also tried using another wifi connection (using a spare wireless N card I had around), and got the same behavior on the 3rd party card.

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Answer 5

Feb 2, 2012 11:43 AM in response to Qtip1423

May I ask if you have tried running Network Diagnostics to try and deternine where the error may be? If so, what does it report?

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Answer 6

Feb 2, 2012 11:51 AM in response to Qtip1423

Here is something to try. Boot into the Recovery HD by holding

down Command+R when booting. Select the get help online option.

It initially opens Safari with a local web page, but you can use

the bookmarks on the bookmark bar or even enter a website.

Many extensions may not be available but it could tell you if

it is your Lion install that is a problem or perhaps a hardware

problem.

If you can browse around in this mode, then it could eliminate

any possible hardware issues. If you still have problems, then

the issue could possibly be hardware/driver related.

Give it a shot and see what happens.

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Answer 7

Qtip1423 Author

Level 1

0 points

Feb 2, 2012 11:53 AM in response to Adam Getliff

I have tried Network Diagnostics. Both Wi-Fi and Wi-Fi Settings are green, all others red. Clicking Continue and joining my network will BRIEFLY turn the Network Settings and ISP lights green, then they'll return to red. It asks me to restart modem, then restart any other devices, then says it can't help. Never, in the 8 or so times I've tried Network Diagnostics, have the Internet or Server lights shown anything but red.

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Answer 8

Feb 2, 2012 11:56 AM in response to Qtip1423

OK - so you are using WiFi.

What WiFi router are you using?

If non-Apple, are there any updates to that which may be relevant?

Have you checked the DNS server settings?

A

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Answer 9

Qtip1423 Author

Level 1

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Feb 2, 2012 11:57 AM in response to woodmeister50

Rebooting into Recovery mode, I can surf the network fine. Able to get to Google and Wikipedia without issue.

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Answer 10

Qtip1423 Author

Level 1

0 points

Feb 2, 2012 12:00 PM in response to Adam Getliff

Yes, I'm on WiFi. Using a Belkin router. DNS and firmware on the router is not the issue, as I have many other clients (including a Mini running 10.7.2) that are connecting fine.

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Answer 11

Feb 2, 2012 12:01 PM in response to Qtip1423

... as long as there isn't a conflict between the Belkin firmware and 10.7.3....

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Answer 12

Feb 2, 2012 12:08 PM in response to Qtip1423

Qtip1423 wrote:

Rebooting into Recovery mode, I can surf the network fine. Able to get to Google and Wikipedia without issue.

This preetty much indicates something amiss in your OSX install

and that the fundemental hardware is okay.

I haven't noticed any mention, but have you tried booting into

safe mode. This disables any third party stuff. If things work fine

in safe mode, then it is time to dig into a bad driver or app that is

loading up and fouling up the works.

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Answer 13

Qtip1423 Author

Level 1

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Feb 2, 2012 1:17 PM in response to woodmeister50

Safe mode does not work. Experience the same issues.

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Answer 14

wifiguru

Level 2

240 points

Feb 2, 2012 4:21 PM in response to Qtip1423

Have you guys tried turning off/on the firewall and then checked if your connection works ? Toggle the firewall state and then turn WiFi Off and On. Check if you can get to the Internet.

Also try downloading the combo update and see if that help's.

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Answer 15

Feb 2, 2012 8:29 PM in response to Qtip1423

I am having the same problem. The only way I can connect to the internet is to manually assign an IP address. I'm looking up the IP address off my iPhone and just picking a close number.

It will not get a self assigned IP address.

A fix for this would be great!

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