I really just want people's opinions, I know the final decisions mine, but just want to know what others think. I have upgraded my imac 2010 to Yosemite from the public beta and only three programs don't work, all of which I could upgrade to working versions but won't bother. My macbook pro 2009 needs to run Mavericks, so the three programs above still work, the main reason I wanted Yosemite was for continuity and handoff, which of course I won't get as both are too old, is it really worth the hassle of upgrading the MacBook Pro, am I actually going to gain much by upgrading. Just opinions please not its up to you, as I already no so much.