Finding Clients by Using Bonjour

You can use Bonjour to display a list of only the computers on your local subnet with Remote Desktop enabled. All other client discovery methods display computers regardless of whether they have Remote Desktop enabled.

Select a scanner at the left of the Remote Desktop window.
Choose Bonjour.
Select the desired computers.
Drag the selected computers to the All Computers list.
Authenticate by providing a user name and password for an Apple Remote Desktop administrator.
The computer is now in your All Computers list.