Since upgrading to Yosemite on my imac,,I think it has something to the hand off thing not sure.. But since then I have been having issues on my wifi on ipad..Imac is hard wired in. Everytime I try to play a utube video or watch a movie on ipad the wifi promptly goes out and I have to do a hard reboot to get it back. Before Yosemite I had no problems. Its not the wifi. I went into system prefrences >general>unchecked hand off on the imac. to see if it helps but no luck..Is anyone else having this problem???help?? Oh yeah ipad only a year old