Epson 51c - Manual (Page 21)

16 Setting Up the Projector
Connecting to a Macintosh Desktop Computer
To connect the projector to your desktop Macintosh, you need to use
the computer cable. If you’ll be using the remote control as a wireless
mouse, you need to connect a mouse cable. If you’ll be using audio
through the projector’s speakers, you need to connect an audio cable.
Connecting the Computer Cable
Before you start, turn off the projector and computer.
1. Disconnect the monitor cable from the video (monitor) port on
the back of the Macintosh.
2. Connect one end of the computer cable to the projector’s
Computer port.
3. Connect the other end of the computer cable to the video
(monitor) port on the Macintosh.
4. Tighten the screws on the connectors.
If you don’t need to make any other connections, you can plug in and
turn on your equipment; see page 23 for instructions.