You are trying to delete files that are not allowed to be deleted by the OS for some reasons that we don’t know.

If you reveal those files in Finder (double click on them) and try to move them to the Trash manually you probably won’t be able to.

From finder if you click on “Get Info” you’ll see more about the permissions of the files and you can also check out whether it is locked or not.

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Category: Mac OS X Utility, Cleaner, Apperture Cleaner, iPhoto Cleaner
Compatibility: MAC OS X Yosemite, El Capitan, Mavericks, Mountain Lion, Lion
The Duplicate Finder for Mac OS X

Quickly reveal unnecessary duplicate files on your file system and get rid of them easily by using our fast, elegant, precise and professional duplicate file finder.

Find and remove aperture duplicates, iPhoto duplicates.

Mac OS X 10.10, Mac OS X 10.9, Mac OS X 10.8, Mac OS X 10.7

Category: Mac OS X Utility, Cleaner
Compatibility: MAC OS X Yosemite, El Capitan, Mavericks, Mountain Lion
Disk Diag for Mac OS X - Clean Your Mac

Quickly discover and clean up your unneeded files to free up tons of disk space with only a few simple clicks.

Mac OS X 10.10, Mac OS X 10.9, Mac OS X 10.8

Category: Mac OS X Utility, Free Memory, Memory Clean
Compatibility: MAC OS X Yosemite, El Capitan, Mavericks
Memory Diag for Mac OS X - Free Memory, Memory Clean

Memory Diag is a beautiful memory optimizer designed for the new memory concepts of OS X Mavericks. Monitor and optimize and diagnOSe your memory usage with a simple click.

Mac OS X 10.10, Mac OS X 10.9

Category: Mac OS X Utility, Battery Condition, Battery Information
Compatibility: MAC OS X Yosemite, El Capitan, Mavericks
Battery Diag for Mac OS X - Battery Information

Memory Diag is a beautiful memory optimizer designed for the new memory concepts of OS X Mavericks. Monitor and optimize and diagnOSe your memory usage with a simple click.

Mac OS X 10.10, Mac OS X 10.9