Hi, As I'm on the brink of buying an iPhone and iPad, I was thinking of upgrading my 2007 MacBook Pro (3,1 Intel Core 2 Duo 2.4 GHz 4GB RAM) right the way up from Snow Leopard to Yosemite so I get some kind of compatibility between the three devices (actually, I would have been happier installing Mavericks, but that's no longer available from the App Store). Thing is - my Mac is right on the edge of Yosemite compatibility and on the web (including this site) there's a LOT of negative comment about Yosemite on older Macs. Should I upgrade? Does anyone have any POSITIVE stories about Yosemite on older machines - I've yet to read one. Or should I wait for some more patches to be released before taking the plunge. Thanks in advance for any and all advice offered.