Connecting an external monitor to your iMac‘s VGA monitor port

If your iMac has a VGA monitor port, you can connect an external monitor.

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Connecting an external monitor to the VGA monitor port

  1. Turn off the computer.
  2. Find the VGA vented cover that came in the computer's accessory kit. If your accessory kit does not have a VGA vented cover, your iMac computer may not have a VGA monitor port. See Operational Note 1 for a list of iMac computers that have a VGA monitor port.
  3. Remove the vented cover from the computer.
  4. Replace the vented cover with the VGA vented cover provided in the iMac accessory kit.
  5. Connect the monitor cable to the VGA monitor port.
  6. Turn on the computer.


For detailed instructions on installing the VGA vented cover choose Mac Help from the Help menu.

Operational Notes

  1. The following models may have a VGA monitor port:
    • iMac (Slot Loading)
    • iMac (Summer 2000)
    • iMac (Early 2001)
    • iMac (Summer 2001)

      The parenthetical product descriptions (Summer 2000) and (Summer 2001) refer to the summer of the Northern Hemisphere.

  2. When you connect an external monitor to your computer for video mirroring, the external monitor uses the same resolution and timing as your computer. In order to view what is on the computer's screen on the external monitor, you must use one of these three resolutions:
    • 640 x 480 at 117 Hz
    • 800 x 600 at 95 Hz
    • 1024 x 768 at 75 Hz
  3. If the external display is not working, try changing the resolution to 1024 x 768 at 75 Hz, then back to the desired resolution.
  4. Video mirroring allows you to show the same image on two different monitors. You cannot set up the second display to create an extended desktop.
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