Hi, Im having a lot of troubles, after coming back to Mavericks from the PB2 of Yosemite, with all kind of iCloud Services. Firstly: yes, probably I authorised the transition to iCloud Drive. I can't remember it with clarity, but is probable I did it. What I didn't expect were the problems I'm having with iCloud in Mavericks. Ok, all the apps that sync with iCloud Documents & Data are broken now. I can't use them anymore, neither on Mavericks nor iOS 7. There are iOS devices that will not be able to upgrade to iOS 8 -sorry for my bad english-, so that, I wouldn't be able to use iCloud with apps anymore if I had an iPhone 4, for instance. My concern extends to other services in the cloud, and I would like to know if that's my fault, is a Yosemite iCloud Drive problem related, or you are also having this issues: iMessage. iMessage is notifying only some of the messages that arrive to my iPhone, in my mac. Others, only appear on my iPhone, and only appear in the mac when I open the Messages app. It is like there's a problem with the push notifications on pre-Yosemite OS X. I don't want to upgrade to Yosemite, because it's performance on my 2010 13" MBP is poor, animations with lag, a huge number of bugs, etcetera. Do you think Apple will solve all this iCloud related issues in osX 10.9? Or will forget this version when Yosemite launches? Anyone experiencing this kind of iCloud sync troubles in Mavericks. It's a shame Apple leave one of it's best operating systems since Snow Leopard, with this unfinished features.