Autodelete .ZIP files
When you open a .ZIP file on your Mac, a new folder is created and your .ZIP file is left intact. After you’ve extracted the files inside to the new folder, you don’t need the compressed .ZIP file anymore. Instead of having to move or delete every .ZIP file you extract, you can set up your system to handle them for you.
Go to Hard Drive > System > Library > CoreServices and open Archive Utility. Open the preferences (Archive Utility > Preferences) and click on the After Expanding drop-down menu. Select Move Archive to Trash. If you’d like to keep the archives in a certain place (i.e. an Archive folder), choose Move Archive To and specify an existing folder or create a new one.