I have a 13.3'' Mid-2014 rMBP (8GB Ram, 2.6GHz processor). I love the look what OSX Yosemite brings but i have a doubt about installing it or not. Because i think it's going to slower the boot-up time etc. Can rMBP users tell their experince on Yosemite? After Upgrade Edit: OS X Yosemite rocks.