Two other things that cause Finder to show stale data: - change the icns file inside an app - enable 'calculate all sizes', then delete a file in a subdirectory

Two other things that cause Finder to show stale data: - change the icns file inside an app - enable 'calculate all sizes', then delete a file in a subdirectory There's no easy way to refresh due to the various levels of caching involved. Closing and reopening windows doesn't help. In the icns case, not even killing Finder helps. So I assume that even if Apple wasn't fundamentally opposed to a refresh button in the UI, it would be non-trivial to implement the back button.