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Mountain Lion WiFi Problems (recap)

Folks, wanted to recap this as I am finding the problem much more broad than my original post (here: https://discussions.apple.com/thread/4162782?answerId=19123146022#19123146022). Here's my setup:

MacBook Air 13", Mid 2011
Mountain Lion
Wifi Problems, cannot connect to open wi-fi and Sprint hot spot.
CAN connect to Time Capsule (at least I could before I started futzing with my setup while on the road)

here's what I've done so far:

Reset SMC
Zapped PRAM
Reduced MTU to 1300
Set hotspot to 802.11g only
Set IPv6 to Local-link only
Set up a new user account, no connection there either
Repair disk
Repair disk permissions
Removed WiFi in networking control panel and re-add.
Remove the network from control panel AND remove keys from Keychain

What I have not done but will try later:

Reinstall ML
Disable WMM

Observations:

ML seems to think there is a connection to the wi-fi, but it can never get an IP address
Using a static IP on the network doesn't help the problem
My hotspot never really registers the MBA as a connection

MacBook Air, OS X Mountain Lion

Posted on Aug 1, 2012 7:18 AM

19 replies

alcinoo

Level 1

0 points

Aug 17, 2012 4:10 AM in response to Branden Williams

changing the channel in the router solved the problems for me, I tried with a few until I found the right one. now its going at lighting speed! thanks for the tips guys

Aug 18, 2012 1:07 AM in response to MariusRime

I had no wifi connection problems with our iPads or iMacs running either iOS5 or Snow Leopard. Only the iMac running Mountain Lion kept dropping the connection. I was convinced it was the operating system but I got a letter from my ISP informing me that they had increased the speed in our area and my gateway (Motorola SBG900) was not capable of taking advantage of the higher speeds. Anyway I ended up purchasing another gateway (SBG 6580) and since switching over I haven't had any dropped connection problems. I only mention this in case others are simply running modems, routers or gateways that are simply out dated. Although I realize this is not the problem for everyone it might apply to some? It never realized how old my gateway was until I looked at what everyone else was running in my neighborhood and realized that I was the only one still using WEP!

Nov 11, 2012 3:46 PM in response to Branden Williams

Here is an idea: why doesn't Apple just fix it so it works, and in the future NOT break things that were working when doing new OS releases. We pay the Apple premium because things are supposed to work.

WiFi and Sound not working correctly are pretty big mistakes (these are known Mountain Lion bugs with hundreds of posts on the internet about them and no fix from Apple).

Jan 23, 2013 11:58 AM in response to MoogNinja

This works perfects for my. Greats.

---------------------------------------------------------

Downgrade to snow leopard driver version.

This will fix your drops:

Unzip, then unzip the Kext Utility, then drop the kext on the Utility app. Supply your password, reboot and then hopefully all is well with your Wi-Fi connection.

http://cl.ly/44180G1R3G0h

Mountain Lion WiFi Problems (recap)