I am new to Mac (Retina MacBook Pro) and my Mac came with Mavericks. I watched all WWDC live and I think I felt in love with Yosemite but it will released in fall So is the date of release is certain? Also is there a way to get Beta version during Beta program? Also if I can get the Yosemite Beta, can I part ion my disk to load Beta Yosemite on one partition and keep Mavericks as my ''core'' OS until Yosemite releases to public? Also If I can't do that, how will I update OS X? Okay, I will download the App from App Store, and simply click to the app to get Yosemite? Is it that easy or are there some steps that I should do before Yosemite releases?