May 29 2008
“The sixth beta version of the iPhone SDK is now available in the iPhone Dev Center.
Upgrade your Mac with Software Update
Before installing and developing with the sixth beta version of the iPhone SDK, you must first upgrade your system to Mac OS X v10.5.3, which is now available. To upgrade your Mac, go to System Preferences and select Software Update to install the latest version.”
Well here it is, and oh yeah 10.5.3 is out now 🙂