I heard Back to my Mac wasn't working in Yosemite and now fixed in 10.10.1. I just installed it a couple of days ago. The good news is it works. The bad news is it doesn't work as well as before. Now I can't watch HD movies smoothly in BtmM. This is important because I'm using Macbook Air to control my Mac mini which connected to HDTV. I don't want to turn on my big ass TV every time I edit the movie. But now I can't mark the frame accurately anymore. In the iCloud preference there's a suggestion to contact my ISP for new DNS server. I believe this is just generic trouble shooting. Anyone can play HD movies smoothly in BtmM? Suggestions?