OSX Yosimite in Alamy Quality Control and technical talk Posted October 21, 2014 · Edited October 21, 2014 by Duncan_Andison A heads up for people upgrading to Yosemite. There are currently issues with WIFI connections. You are likely to experience either painfully slow internet or, complete drop outs of access. Works fine if hardwire connection is used. This will affect things like TimeMachine as well as internet access if you are connecting via WiFi etc. Within the first few days, this issue has earned a lot of space on the internet so hopefully, it will be resolved soon. No problems here using wifi or ethernet - runs at 20 Mbps (as it should be). Likely to experience problems may be a bit too strong a statement. It would be interesting to know what proportion of users are affected. I said likely due to the fact that there are 1000's of people suffering from it. It made the news. If you check the Mac forums, threads were into 20 plus pages after the 1st day. This isn't bashing Mac, I am a big user of their gear.... imacs, macbook pros etc. A quick search reveals the extend of the problem. Edit, there are a few temp fixes but normally, the problem comes back after a few hours. There are no problems with Ethernet (wired) connections.