OK I'm now on Lion DP3 and trying to install DP4. I downloaded it from appstore but when i run the installer i get to the screen where you select the harddrive where to install...but the harddrive (the only on) on this computer is grayed and it says the computer cannot be booted from this hard drive or something like that.
Is this a bug that you can't upgrade from DP3 -> DP4?
Is this a bug that you can't upgrade from DP3 -> DP4?