Yosemite 10.10.1 update did not fix my wifi issue, did it fix yours??
The discussion about wifi issues is nothing new since Yosemite came out. Today I installed the latest update (10.10.1) which was to help with wifi issues such as your wifi dropping. I have tried every remedy that has been posted and nothing has worked. I constantly have to re-connect to my wifi network while on my computer. I guess I will sit patiently until this is resolved. I was excited to see the new update but after downloading and installing it, I see that nothing has changed. I have an iMac (2013) and have never had internet issues until I installed Yosemite. I hope the update helps you but it didn't help me.
Mac Pro, Mac OS X (10.7.2)