How To: Remove Passwords from Password-protected PDF Files

Here's another trick I found that came in real handy about a month or so ago. 

NOTE: You must have admin rights and the ability to print the file in question.

1. In Finder, press Shift-Command-G, or select Go » Go to Folder.
2. Type /var/spool and press Return.
3. The spool folder will open, and inside there will be several folders. The cups folder will have a red Stop sign on it.
4. Select it, and then press Command-I (or use File » Get Info).
5. In the Sharing & Permissions section of the Get Info window (at the bottom), click the lock to open. You will need your administrator password.
6. Now click the "+" sign and add yourself to the list. You only need 'read only' privileges.
7. Now open the cups folder.
8. View the cups folder as a list (View menu) and sort by Date Modified.
9. Open up your favorite PostScript printer by going to Print and Fax in System Preferences and selecting it from the list on the left. If you don't have one, install one.
10. Pause the printer.
11. Print your PDF to this printer. It will complain that the printer is paused. Click Add to Queue and not Resume.
12. The print file will show up in the cups folder at the top with an obscure name like d00023-001 (ignore the corresponding file c00023).
13. Drag this print file to your Desktop (or wherever). You will need your administrator password again.
14. Add .pdf to the end of the file name, and open with Preview.
15. Delete the print job in your PostScript printer.