Does Snow Leopard break your wifi?

Same thing here. SL keeps forgetting the preferred network and password. If it goes on sleep, I have to reconnect. It seems that it has big issues with password, email and bluetooth. Looks like a non tested release....

No problems with my WiFi - using a LinkSys WRT54G. It also works with the DLINK and Netgear routers at work (on my MacBook).

This is not to say that it works everywhere, but the problems are far from universal.

What kind of router are you using? What happens if you create a new network location?

Cheers,

Rodney

Since you asked, mine is much improved over Leopard. Faster reconnects from sleep.

The wifi problems I have seen usually are tied to interference.
Another thing to try is delete all of your preferred networks and your keychain entries for the network.
Your password should be in the System keychain. If it is in both the System and your login, it will get confused.

I had the same problem with WiFi at work. Since I bought my MPB I have had no issues. The day after I upgraded to SL, it wouldn't connect. So it isn't interference, etc...

The solution I discovered was to hard wire a connection to the network (if this is an option for you). I shut off airport, then plugged in my CAT5 cable from my desktop. Let it connect, and then unplugged it. Turned airport back on. This time it finally prompted me for my security password (something it wouldn't do before because of the saved preferences???). That was it. I've been connected since.

I don't claim to know much, but from what I've read it has something to do with the dynamic assignment of your IP address. A glitch for some routers/networks and SL. I had no issues with my WiFi at home so it isn't universal. But it is happening and it is a real glitch. I hope this helps you get to a quick solution.

Slawrensen wrote:
One of my family members has a MBP 13" with SL and they haven't had any problems. I hope apple releases a software update to fix this.

So you want Apple to stop your family members from having no problems 😀

Tee hee !

I have upgraded to snow and now I cannot turn on WiFi any ideas, cable still works but lost lots of third party applications, is any of these causing it to not work?

You should start a new thread with the specific issues you are having. Maybe even examples of what 3rd party programs are not working.

There is no one answer for a shotgun question like yours.

I have a Mac Mini with a 3rd party 802.11n card installed. Using the Network Utility application, I confirm that the OS knows it is 802.11n capable. However I cannot connect to my 802.11n network anymore. This worked just fine with Leopard, but is broken with Snow Leopard.

I have this problem too an my Macbook (Oct 2006 model) Wifi was fine before the snow leaopard upgrade. Now it won't connect or doesn't even see my network yet it can see my neighbours networks fine. Tried creating a new location but to no avail, everything works fine on my imac. Come on apple release a fix as this seems to be a common and VERY irritating problem!!!!

I've got a MacBook Air and I have to say that there are no problems occuring when connecting to the wireless network at home - no, there are even less connection errors than with 10.5.x as well on the Netgear Router and the Airport Extreme! In my opinion Snow Leopard made my network faster!

After installing Snow Leopard on my MacBook Pro wifi slowed to a crawl. I installed a Hawking usb external wireless connector and that didn't help. I can run Windows XP or Ubuntu Linux under both Parallels and VM Fusion and the wifi is FAST, just like it was with Leopard. I believe, at least with the some models of the MacBook Pro, Snow Leopard is a killer for wifi - routers and other possible hardware issues do not explain normal wifi when running virtual OSs.

You could:

Go Finder > Your HD > Library > Preferences > SystemConfiguration.
Move the SystemConfiguration folder to your Desktop.
Restart.
Try your browser.
Keep your System Configuration folder for a while just in case.

Have u found a fix for this? This thread is too long to read actually...but I had a client in the other day to our studio and the same thing was happening with his new 2009 mbp 17", we could see my neighbors wifi networks but not mine, just 5 feet away. Made us look like a dork, even though all our machines have no problem with our Lan. Would like to have an answer before he comes back! thx...