Hey guys. I have a macbook pro, non retina, mid 2012. I have the latest Mountain Lion version installed. - Should I upgrade to Yosemite or wait till Capitan? - Are there real performance OR noteworthy improvements from ML to Yosemite? My biggest gripe with ML is the 20 secs restarts and shutdowns. I was hoping I can correct that with Yosemite, but other than that, I don't think I miss anything really. I need some clarity, folks!