Hi, I would like to know some things about instaling the the OS X Mavericks in my Macbook. First of All, will I lose everything in my mac? Like a Restore on the iPhone; Or Will it keep everything in it's place? Like an Update on the iPhone. And, to install it, is it just like installing the GM version*? *Yes, I know about the risks of installing it directly in my system, and I am willing to take them. **I am going to install the DP 1, than the DP2.