Hi, Mostly satisfied with Yosemite but there are very irritating occurrences. I always stay logged in to my gmail account, likewise with Facebook, because I'm regularly receiving messages. Although I haven't put my mac air into sleep mode or logged out of gmail and FB, Yosemite is constantly logging me out of those two sites. I'm no geek so any plain talking advice would be much appreciated. thanks. p.s. I have searched the forums, because I'm sure there are others experiencing this problem, but could find nothing. But apologies if I'm duplicating.