Sharing Rekordbox Library across two Macs

Works fine at my two Macs.  My music files are in <myprofile>/Music on my Macbook Air.  I export the library (the database, not an export as syncing playlists to usb) to <myprofile>/Rekordbox.  On my Macbook Pro I have exactly the same folder structure.  I copy both subdirectories to the other computer and re-import the libary.  Works fine, but is a lot of work.  Therefore I'm using Dropbox, so the music files are automatically in sync.  Still I need to export/import the library.  But I thought you could move the master database to an USB device too.  That should be working too, however I've never tried it as I don't trust USB devices for storing everything.

Are the files on both computers in the same folder structure?  Else check in the menu, there's an option "find missing files" -> there you can relocate your files to the exact folder structure.

Christophe, thanks for the pointers, and this workaround works.

However, this a heap of unnecessary work.  My Rekordbox license expired and I had to pay Pioneer $128 USD to get back to where I was.  The license is already valid for two systems.  Clearly, Pioneer knows that we oftentimes use two systems, and so I assumed that synchronization of the music library would be (better) integrated than it currently is.  We need to have the ability to work off of a single drive (USB, shared or on a NAS filer such as Synology).