DVI display ports
You can also connect displays that have an Apple Display Connector (ADC) or a video
graphics array (VGA) connector using one of the following adapters:
Â To connect a VGA display, use the Apple DVI to VGA Display Adapter included with
your Mac Pro to connect the display to the DVI port.
Â To connect an ADC display, use an Apple DVI to ADC Display Adapter, not included,
to connect the display to the DVI port.
To purchase an Apple DVI to ADC Display Adapter, contact an Apple Authorized
Reseller, visit an Apple Store retail location, or go online to the Apple Store at
DVI to VGA
on display cable