If you created a library in a previous version of Aperture, a selection of Smart Albums was set up in the Library inspector for you automatically. When you click the disclosure triangle beside Library Albums in the Library inspector, you see the following Smart Albums:
Five Stars: Select this Smart Album to see all photos in the library that are rated five stars.
One Star or Better: Select this Smart Album to see all photos that are rated one star or better.
Rejected: Select this Smart Album to see all photos that are rated Reject.
Videos: Select this Smart Album to see all video clips in the library.
In the Last Week: Select this Smart Album to see all photos taken in the last week.
In the Last Month: Select this Smart Album to see all photos taken in the last month.
Important: Library albums appear in the Library inspector only if your Aperture library was created in Aperture 3.2 or earlier.
Open an Aperture library created in a previous version of Aperture.
The library albums appear in the Albums section of the Library inspector. For information about switching libraries, see View other libraries.
If you’re working with an Aperture library created in a previous version of Aperture and you no longer want to see the library albums, you can remove them.
In the Library inspector, select Library Albums, then choose File > Delete Folder (or press Command-Delete).