These can be copied and pasted, one line at a time, to the Terminal, but since they recursively target specific folders, be sure to use this exact syntax to avoid any problems: The first is to use the Terminal (in the Applications > Utilities folder), which can be done by running the following two commands. There are two ways to remove this folder. However, if such behavior happens for files on a locally attached drive, you can go about fixing the issue by locating and removing the hidden trash folders (one in your account, and the other at the root of each locally mounted volume on the system), so the system will rebuild it with proper access permissions the next time you place an item in the trash. Note that there is no trash support for networked volumes, so deleting items from them will result in their immediate removal. This should in most cases empty the trash completely, but if you are experiencing more severe problems, the trash may still remain full, or won't allow you to add items to it (they may be deleted immediately).

If you decide to empty the trash in OS X, and end up getting an error or otherwise not seeing the contents delete, first try holding the Option key when emptying, which will invoke the OS X Force Empty feature, bypassing things like file locks and removing any file you have in the Trash. Often this occurs because of access permission faults with the hidden trash folder that OS X uses as an intermediary for storing trashed files before they are finally deletes, but at other times it occurs from built-in restrictions like having locked files in the trash. There are several reasons why the trash bin in OS X will not empty, or will not otherwise work as expected.

Mac os x force empty trash