Just downloaded and attempted to install DP4 on my 2010 MacBook Pro. I was watching the installer log and soon noticed that it was hanging on this Jun 6 20:32:18 cpe-67-252-43-84 OSInstaller: FileURLGetDYLDEntryPointWithImage(/System/Library/PrivateFrameworks/Librarian.framework/Librarian,LBGetAttributeValueForItem) failed It would do this over and over again. I even reached the point where the installer window was telling me that I had "-2 minutes" to go. Did anyone else have this issue? Thankfully I have win7 installed on this computer also. Im going to attempt to insert my SL disk and see if I can run some disk repair on my HD from there.