OSX Lion: The Installer can’t open the package. There may be a problem with file ownership or permissions.

Was getting this message when trying to install anything on OSX Lion:

"The Installer can’t open the package. There may be a problem with file ownership or permissions."


For me, it was a permissions issue, not with the downloaded application, but with the Installer itself. So I open Disk Utility, selected the Boot Drive and repaired permissions.


All is now good.