


PuTTY during its internal processing attempts to resolve the host name component if present. This string occurs in the location traditionally used as the host name (or IP address). As part of that infrastructure the DISPLAY data includes a string interpreted by launchd. With that it became somewhat more Mac-like and integrated into the launchd environment allowing X11 applications to be supported without explicit action by the user. Leopard brought a previously additional, externally supported X Window System package into the official Apple distribution. all the information flows through the ssh tunnel to XQuartz, which renders the windows on your Mac. That is, it sets up a secure tunnel between the program (like xclock) running on the server and the XQuartz application on your Mac the program can create windows, buttons, menus, etc. There are meaningful defaults for each if absent. The -X option to ssh sets up X11 forwarding for ssh connections.
XQUARTZ X11 FORWARDING SERIAL
PuTTY is an open-source, multi-platform SSH, Telnet, Rlogin and serial interface terminal emulation application with a host of configuration items.
