Yesterday, AWT posted a “how-to” on “how to force the Trash to empty in macOS Sierra.” My buddy and sometime-AWT contributor, Frank Petrie, has another suggestion.
“I use the app 'Trash IT!' Works fine for me. Just Google it and you'll find several sites that have it,” he notes.
Trash It! is a little app for macOS 10.7 or later that force-empties your Trash. It supports drag and drop. It’suseful if you have files or folders in the Trash with permissions set incorrectly, locked Trash items, want to delete a stuck item, or trash items from other partitions. If you drop files or folders onto the Trash It! icon, it will delete them. If you double-click on it, it will clean out your Trash can.
Trash It! is “donation ware.” If you use it, give its developers some moolah, so they can continue to develop software.