Open your Norton device security product. To set Norton Clean to automatically delete junk files, see Schedule or customize Norton Clean scans to help improve your Mac's performance Run Norton Clean to remove junk files By default, Norton Clean moves junk files to your trash, but does not delete them. Norton Clean does not scan connected devices and only runs on Mac OSX 10.10.5 or later. Norton Clean removes many types of junk files that can slow down your Mac. Junk files, including temporary, installation, or even duplicate files from your email or photo albums, can impact computer performance.
Run Norton Clean to remove files that can slow down your Mac