1) I bought a book
2) I downloaded the .acsm file from the site where i bought
3) I installed Adobe Digital Edition (for OSX)
4) I did the authorization with my Adobe ID
5) I did: File > Add to Library > .acms file
6) I have the book readable in Adobe Digital Edition, but when I go to the folder I found a .epub file that is corrupt.
Retrieving data ...