I have also been waiting for a fix since my WiFi started failing after the 10.6.5 update. Over the course of a month I have been following this thread hoping someone would come up with a reliable fix for this problem. I have tried all of the voodoo fixed suggested here and on other pages found on the internet that address this issue. I have taken my MacBook Pro into Apple where the Genius scoffed at the idea that an Apple Support thread would hold any validity saying "Anyone can post stuff there, and if it has not been identified as a problem in our database, then there is pretty much nothing we can do." He also went on to suggest that the age of my MBP could also be the problem. His analysis made me roll my eyes... a 3 year old machine, while surely closer to the end of its life than the beginning, is hardly due to be retired for the latest and greatest model. And after testing the Airport card in my Mac, he seemed to think it was operating normally. After my consultation with the Genius, I have written to Apple about the bug describing the issue in detail, hoping an Apple engineer will take note.
At least for me, it seems to be a proximity issue with wifi routers. The problem may be with how the the wireless software calibrates the signal level. When I move more than 15 feet away from my router the Airport signal drops from full power to nothing and then drops the connection entirely.
Before the 10.6.5 update I got strong reception throughout my house and could even see many of my neighbours wireless signals.
After the 10.6.5 update I can only see my wireless network and I can only connect to it when I am 15 feet away or less. While not the same problem, the signal calibration seems to be similar to what Apple admitted was an issue with all of their iPhone models, where the iOS software was incorrectly displaying cellular signal strength. But while the iOS software was exaggerating the signal strength, 10.6.5 seems to be unable detect the gradual reduction of signal power as I move away from the router... as I mentioned previously, instead of gradually going from full bars to four... to two etc, it goes from full bars to no connection at all within 15 feet.
Some people have said that the issue stems from Apple updating its 802.11 specifications. However, I doubt that is the case for a few reasons. First, I ended up buying a new router early in the troubleshooting process that has up-to-date firmware suspecting my old router was the culprit. but after setting up the new router the problem was not fixed. Second, if this was due to Apple updated specs they would a) Have informed users with incompatible Airport cards that their Macs are now legacy hardware or b) they still would have made these machines usable by preserving backwards compatibility. Finally, while it seems the 10.6.5 update broke my wifi, by GFs unibody MacBook Pro's wifi is working normally, detecting all of the previously mentioned networks (which leads me to think it is an installation issue affecting only some Macs). In addition, I travel a lot for work where, since the update, I have had troubles connecting to wireless networks at hotels, airports and coffee houses... I find it hard to believe that
all of these locations, using many different router brands would
all be incompatible with Apple's newest wifi specs. Add to this, my 6 year old IBM Thinkpad's wireless works perfectly fine with both my old router and the new one I bought a couple of weeks ago. No... this is a software bug - no question.
I think at this point it is pretty clear that, for some users, the 10.6.5 OSX update failed to install properly or has a miscellaneous code error relating to how the OSX operates wireless. Perhaps it is related to how 10.6.5 interacts with certain Airport cards or their firmware. Regardless, I hope Apple does right by its clients and offers patch soon or at least acknowledges the problem, which to my knowledge, they have yet to do.
Message was edited by: codyMR