Hard drive of your system may be full of duplicate files and folders which captures unoccupied space and results in slow down system performance. So it becomes essential to delete all those duplicate files and folders from your system hard drive so that it can function properly. Duplicate file finder for mac is effective software which is capable of finding all these files and folders which have either same name or have same content in them. It is capable of scanning entire hard drive for finding each file and folders. It presents them in tree like format. For more info http://www.duplicatefilefinderformac.com