By this time you should know that iCloud requires minimum of OS X Lion and iOS 5.
- OS X Lion requires Intel Core 2 Duo or newer.
- iOS 5 is compatible with iPad, iPhone 3GS, iPhone 4, iPhone 4S, iPod touch 3rd Generation and iPod touch 4th Generation.
MobileMe is set to reach the end of life on June 30th, 2012. MobileMe users are advised to move their accounts to iCloud.