Can I synchronize or merge two bookmark lists?

In Bookmark Buddy, you can import bookmarks into an existing bookmark list: in the import window there is an option to 'Append to existing list' with a drop-down list of known bookmark lists.

You can also move (or copy) bookmarks from one list to another: simply mark the items you want to move or copy in the first list; then switch to the second list and select Move marked or Duplicate marked from the Edit menu.

You may find useful the tip on Sharing a bookmark list between non-networked computers.

Future updates to Bookmark Buddy will include additional features in this area, to synchronize and de-duplicate bookmark lists.

With URL Organizer 2, to import into an existing URL list you must first import into a new URL list, then move the bookmarks from the new list to your existing list.

If your question isn't answered here please do get in touch.