GHETTOPIA  This program simply doesn't work. I've ran Synergy without a GUI successfully, as well as the wonderful QuickSynergy. But no combination of IP addresses or computer names can make this work.  
(Version 1.0b6)

GHETTOPIA  I wholeheartedly would advise against using the previously mentioned solution using Terminal.

I tried it myself, and it reset my Mac user password. When I restarted, it never made it to the login screen; instead it stated:

/etc/master.passwd:

No such file or directory

-sh-2.05b#

My password was deleted! I had to boot my computer in Target Disk Mode and use a friend's computer to copy my /etc folder from a backup on my external hard drive back to my computer. Then, I had to create a new account on my computer, log in to it, and recreate my original account.

I'm still having major issues with all my saved passwords. Apple's website listed how to delete my old Keychains so that I'm not constantly prompted for the former account password that doesn't exist, but now none of my Keychains are being saved at all.

DEFINITELY not worth the time compared with simply dragging files out of the cups-pdf folder onto the Desktop.  
(Version 2.4)