As the subject states. I don't think this model supports any of the main continuity/handoff features of Yosemite anyway but I was wondering if you guys thought that it would be best to leave it Mavericks vs. Upgrading it to Yosemite. Computer will only be used for internet use/streaming of movies via netflix/youtube and email. It was my mobile workhorse (or pony basically) but I'm thinking of giving it to my Mom to use to replace her even older White Macbook. Thoughts?