Answer:
There isn't a perfect way to refresh Finder windows in OS X. You can, however, force a refresh by hitting the back button and then forward button in the window. Or you can open a folder within the window and hit the back button. Another option is to Force Quit (Command+Option+Escape) the Finder.

Создайте нового пользователя. Если и у него не будет работать удаление в корзину -- переставляйте систему заново.