MacPass
A native OS X KeePass client
... or between two files. Add file attachments by dropping them onto entries. You even can add entries by dragging URLs onto the database. Enable previews to leverage the QuickLook system for previews of a variety of file types to take a look at your file attachments. MacPass can read and write KDB Legacy files as well as the latest KDBX Format. You can even convert KDB to KDBX and the other way around.