@dyn.
It's simple logic really. It worked fine in Mavericks, it didn't in Yosemite.
I was merely wondering how the known workaround of disabling iCloud Keychain works out for the poster above me. There are many known workarounds and fixes so it really helps if we know a bit more about which hardware and software is used. If people with the same stuff run into the same issue they can try the same workaround.
It isn't about if it worked in version x or y, it's about how to get it to work properly. And, that isn't simple logic as "it worked when <insert reason> and stopped when <insert reason>". Yosemite is a rather big change from Mavericks which requires software (drivers, apps, etc.) to be updated. It is not uncommon that this requires buying an upgrade which usually aggravates people who simply refuse to buy it and continue with the old unsupported version. How do you know that this isn't interfering with things? It happened with SmcFanControl for example.
I don't understand why you are so unwilling to believe that the problem may be/may have been with the OS.
Because I'm not, I'm only warning that you guys are oversimplifying the problem which leads to a really bad analysis and in quite a lot of cases to the wrong fix/workaround (people apply it and then notice it doesn't work). The difference is in the message. Yours is: "it's OS X, if you have wifi issues restoring to a previous version solves everything!". Mine is: "check what's going on, search for similar experiences, try out various fixes/workarounds and see what works; if all else fails you can always restore from backup". I can guarantee you that people will have found the solution to their wifi problems much quicker with my advice than with yours.
You haven't been able to give any useful suggestions thus far in this thread and you seem to be annoyed that people have come to the conclusion that it's down to Yosemite so perhaps it's best to stay out of the thread until you have a useful suggestion that may fix users issue other than "wifi is complex".
That's because you didn't bother to read any of my replies and because I disagree with the "restore to Mavericks because it fixes your wifi issue" tantra of yours. I'm an engineer interested in finding the solution, not a marketeer like you shouting silly things. So stop trolling and start reading peoples replies here. If you want a solution then experiment with the various given workarounds and restore when all else fails.
Remember: sticking your fingers in your ears will get rid of the loud noises but it will also stop you from hearing the nice things like music, birds, etc.
What puzzles me the most is how inconsistent the problem affects people. And what I mean about that is that you have some people who it never effected, some people whom it did, and then you have the case where the last update fixed your WiFi issue and yet the last update did not fix it for some other people.
Exactly. Just because it fixes things for someone else doesn't mean it will fix it for you too. There is no magic fix or formula that helps in every case. The only way to find out is to try it and since restoring or even reinstalling takes a lot of time go for the fixes first. If one of those work you just saved yourself some time
The only constant seems to be Yosemite.
Duh, guess which version is the current OS X version. Now if you then also take into account that OS X has a very high adoption rate when it comes to new OS X versions you should be able to do the math. The only reason that Yosemite is the only constant is because the majority of Mac users run it. That's the problem, in fact there isn't really a good constant in this issue. The only actual constant is that a lot of people are having wifi issues and a lot of them get it fixed by getting rid off discoveryd, installing the OSX patches or even restoring a backup. That's why I wanted to know more about things like the hardware, maybe we'll see a constant there.