Closing the window of the Tools -> Autocorrect Options... dialog on OSX has no effect. The close button in the top left corner of the window frame highlights red, indicating that the window should be able to be closed. However, nothing happens when it is pressed. The OK / Cancel buttons within the window work as expected. The close buttons for other dialogs in the Tools menu also appear to work as expected. This occurs in both Writer and Calc, so I assume that it is a shared UI issue.
Thanks for your time reporting, but it seems like this is a duplicate of Bug 57905. Therefore I mark it as such. Kind regards, Joren *** This bug has been marked as a duplicate of bug 57905 ***