MacTCP
Setup
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Step 2: Configure TCP/IP
Some Macintoshes use Open Transport 1.1 Networking controled by the TCP/IP Control panel.
Open your Control Panels folder, then double click on the TCP/IP control panel.
It should be configured as follows:
If you don't see all of the choices, go to the Edit menu and select User Mode and set it to Advanced. When you have configured it according to the graphic, click the close box at the top left of the window and -- when prompted -- save the configuration.