It can also be done via drag-and-drop, no need for the Terminal if someone should be afraid of it
Originally Posted by rashkae
The only difference for a Mac OS user is that the .kobo folder is hidden (because it is supposed to be, the . does that).
In the Finder, go to the Kobo's memory ("KOBOeReader"), then in the menu bar select "Go / Go to Folder ..." (or press "shift+cmd+G"), type .kobo into the pull-down and press enter. Voilą, you are inside KOBOeReader/.kobo/
Then proceed as described by rashkae.