If a folder you want to synchronize is on another Mac you control running Mac OS X v10.6 Snow Leopard or later, SynkSharing is the best and easiest way to synchronize with the remote machine.
The “local” Mac is the one where you’re setting up the Synk script, and the “remote” Mac is the one where the other folder you want to synchronize is located. If either of these machines is using software like a firewall that may restrict network connections, see Using SynkSharing with a Firewall.
If the remote Mac is on the same network as the local Mac, or you’ve set up Apple’s Back to My Mac or another wide area Bonjour provider, the remote Mac may show up in the “Local SynkSharing Servers” list.
Choose the remote Mac from the list if it appears, or enter its network address in the Server Address field. Click Connect. Synk shows a dialog with a secret passcode, and contacts the remote Mac for authorization.
Remember to keep the remote Mac's version of Synk updated to the latest version whenever you update the local Mac's version of Synk. While we try and maintain some backwards compatibility for large deployments where it's hard to upgrade everything at the same time, SynkSharing will work best if both versions are the same, and you'll want to make sure you've got all the latest bug fixes and improvements anyway.