As long as the recipients have access to the file, they will be able to open it ( Dropbox idiosyncrasies not withstanding). Then you can insert that link in an email, text message, or any other communication medium. Just select Hook on the file and invoke “Copy as Link”. You can even share Hook links to files that are in Dropbox files. (Hook will either reveal the file in the Finder, or open it, depending on Hook’s General preferences). Thereafter, you can simply click on that link to access the file. Once you’ve used Hook to get the address of a file that is in Dropbox (using “Copy as Link”), you can paste a link to the file wherever you want. Paste links to Dropbox files in your documents This document describes some ways in which you can use Hook with locally synced Dropbox files, and some of Dropbox’s idiosyncrasies as they pertain to Hook. And you can even send links to Dropbox files to people recipients can then click on the links to open and reveal the files directly on their own Macs. Hook links to Dropbox can reveal or open Dropbox files on your Mac -this rapid access method allows you to bypass Spotlight, launchers, and the Dropbox website. With Hook, you can also link to and from Dropbox files that are locally synced on your Mac.

How to find dropbox links