Mac laptops forum: MacBook Pro Drops Connection after Snow Leopard upgrade...

while some report performance boosts in that area. Not good for me. My MacBook Pro, a 2007 model, is quite faster though, and my internet connections are faster than ever and have not dropped at all since the upgrade. It would appear there are a handful of problems for Apple to deal with. I'd prefer to see some patches sooner rather than later...

Have you ruled out a modem problem? Reset the modem and even change the password which is stored in the modem if necessary. May not help but you never know.

You were advised to remove the battery and replace it. It sounds as though you are lucky not to have one of the new MacBook Pros, since the battery cannot be readily removed by the owner. I confess that is one of the main stumbling blocks for me when I think of getting a new laptop. (I would use it on AC power, most of the time, anyway, as a replacement for a desktop.) Now I am even less keen, because by the time I get to having a new laptop, Snow Leopard will most likely be the OS on it.

How I wish that Apple would go back to removeable batteries. Gone are the days when one could pack an extra battery for travel or just replace the one in the computer easily, if something went wrong. Well, that is not entirely relevant to your problem, but it is certainly an issue, if removing the battery won't work for people with the new MacBook Pros, yet that is what Apple is advising for your problem with Snow Leopard.

After trying everything else, I found that my Timecapsule / Airport was one update behind. Although I did run into a few bumps updating the firmware from 7.4.1 to 7.4.2, this appeared to solve the problem and I'm connected again. Not sure if this is relevant to the situation of others here, but it hopefully provides a hint at least.

Hope it is not a DNSChanger Trojan. You might like to download a free version of MacScan and scan the computer. If DNS has a number 85 (I guess) in it, it may be bad and needs removal. Simply putting the new one in does not remove it. Hope this is not the case but may be worth checking.

I too am having the same problem on two Mac's. The Airport indicates I am connected to my local network. But Internet is not available. I have tried another browser ( Firefox 3.5) and it has the same problem. I have also tried the solutions on Apple's forums and like others It did not permanently solve the problem. As both a Mac and PC household I seem to remember Vista having the same issues when first released with certain routers not able to handle the extra traffic that Vista had added to its network connection. Seems like the mention of disabling the IVP6 was also talked about. But in the end many simply had to upgrade their router if it did not have a firmware update to fix it. Not sure if that's the case here because I have turned off IVP6 and still am having the problem.
One thing is for certain that Snow Leopard is to blame because nothing has changed.

2 Apple engineers from Cupertino (like a visit from royalty!!! -fortunately in my area for someone else) were at my house last week troubleshooting for 3 hrs! They were very professional & helpful. Determined that the at&t 2Wire Gateway 2701HG-B router was dropping outgoing signal. They did data capture tests & showed me screen image indicating strong incoming DSL, but unstable outgoing from the router portion. Said they've heard of lots of similar issues w/ that modem/router which at&t still provides to new DSL account customers. They suggested I disable the router portion & hookup with new Airport Extreme router (or any newer router). Did it last night, so far no more unstable wifi! AE even works great for the Vista laptops here, altho they are type 'g' versus my iMac being type 'n'. It sends out separate signals for each type. Apparently the Snow Leopard timing was merely a weird coincidence. Whatever, I'm very happy w/ Apple again.

After performing a google search to find a solution for my Macbook Pro losing internet connectivity after upgrading to 10.6, the first result was the post on Cnet - from user "luisp--2008".

I went through the solutions provided to him by Apple, one by one.

Of course, it was the last one that actually worked: deleting the SystemConfiguration folder and rebooting. Hope this helps someone else.

I navigated to the incorrect Systemconfig folder. I have made the correction and deleted and rebooted. Will see how this works for the connectivity and reliability of the ethernet connection.

Al

I started having problems with my new 21.5" iMac a couple of days ago. When I got in the morning and woke it up it could take as long as five to ten minutes to get the wireless connection back up. When watching streaming videos I would lose the connection 20 minutes into a 40 minute show. I ordered a new Airport Extreme (my old one is the round type G Technology) but was unconvinced that that was the total answer. I checked this forum and found a post which discuss the same problem and said that changing the channel setting from Automatic to a set channel, he recommended 3 or 9, I used 9, would resolve the issue. It did. Things suddenly got rock solid.
The procedure is to go to Airport Utility, click on your router, go to manual set up and then set the channel to which ever one you want.
My guess is that in automatic mode it changes channels periodically which causes the drops. This wasn't a problem with my 17" iMac which also had Snow Leopard before I sold it, so I suspect it is a matter of advancing technology, Apple pushing the limits on the new machines and using the OS to do it. I would say that this fix is solely for machines kept in one location, iMac, etc.

First, the first update you recommend is not for your computer (client) but for a server. I have no idea how it got properly installed. Second, the updates that you list can be just downloaded and launched from the hard disk (desktop) without a USB drive. It looks to me like a rather unconventional approach. Since it worked, it would be interesting to learn how you got to this procedure (web site, forums, intuition, playing around, etc.).

Hello, I have found the final fix for this problem. This fix is the only one that worked and gave me a working connection all the time.

Initial Problem:
Macbook Pro was dropping connection of wireless networks after waking up from sleep mode. It would also drop the connection without notice. Airport bars keep going up and down.

What you need:
Macbook Pro
Charger
This update: DOWNLOAD FROM ANY WORKING COMPUTER TO USB
http://support.apple.com/kb/DL958
This update: DOWNLOAD FROM ANY WORKING COMPUTER TO USB
http://mac.softpedia.com/get/System-Utilities/AirPort-Client-Update.shtml

Steps:
1. Install all updates mentioned to usb stick.
2. Boot-Up Mac to desktop.
3. Open USB key folder
4. Run 10.6.2 Snow Leopard Update
5. Computer will restart to complete installation
6. After Mac boots up to desktop, open usb folder
7. Install Airport Client Update
8. Computer will restart to complete installation
9. ENJOY YOUR MACBOOK WITH STABLE CONNECTION

Hope this helps. I am very new to Apple and upgraded without a second thought. I paid a repair centre $20 to resolve this issue. The guy was nice and wrote me up a document explaining everything. Please DIY this problem to save money. Unless, you have applecare Its funny how the apple geniuses don't know how to resolve the issue and replace your macbook.

Its been corrected.

After a more than a year of use without any dropped connections, my 17" MacBook Pro developed the problems described in the series of posts here. (In fact, I just lost the connection again in the course of writing this post.) Dropped connections began occurring before I upgraded to Snow Leopard. Ironically, I upgraded to Snow Leopard (rather than reinstalling 10.5) in the course of following the trouble-shooting protocols suggested by Apple Care.

My point in writing is to report that my computer was behaving in the manner we are all experiencing prior to upgrading to Snow Leopard and that I continue to experience the problem after upgrading, suggesting that in this case, at least, it may be a hardware problem

After I clone my hard drive, I will be heading off to an Apple store to have the computer diagnosed and will report back.