I have a Mid 2013 15" Retina MBP First upgraded to Yosemite when it came out basically. Issues: 10.10.0 = no "problems" with wi-fi per se (at least, no connection problems). I did however notice that whilst torrents downloaded just as fast as previously, connecting to websites was a lot slower than normal (I'm talking seconds, as opposed to almost instantaneously with Mavericks). Then I upgraded to 10.10.1 = major wi-fi problems. Sometimes just wouldn't connect to the home network any more, unless I restarted the computer. Often (and I mean VERY frequently) even though it was connected, it would just drop the connection and I would have to manually reconnect, only for it to drop seconds later. This was completely unbearable (and unnacceptable), so I clean installed back to 10.10.0 again, and just made do with the slow loading websites. Now I'm thinking if I should upgrade to 10.10.2 or stay with 10.10.0? Wondering if any of those bugs have been ironed out or if I should just not bother upgrading at all? I'm probably going to buy a new 15" rMBP when it is released with 10.11 (in order to hopefully get a brand new machine with an OS that works better out of the box), so should I just stick with what 10.10.0 until then?