eps2pdf is a freeware application to convert encapsulated postscript (eps) files to the Portable Document File (PDF) format.
The main goal was to make the conversion of many eps files as convenient as possible.
You can drop many files and entire folders at once onto the eps2pdf icon (e.g. in the Dock or in the Finder toolbar).
You can pick files and folders with the standard open dialog.
And you can use AppleScript.