1. Install X11 for the Mac.

2. Open an X-terminal and type
> xhost remote_ip_addr
10.x.x.x being added to access control list

3. Connect to remote machine via telnet
> telnet remote_ip_addr
Trying 10.x.x.x…
Connected to 10.x.x.x.

4. Enter login name and password to start session
login:
Password:

5. In a telnet session, type
> setenv DISPLAY local_ip_addr:0.0

6. Launch your application
> nclaunch