Other than being proprietary, ADC has two other drawbacks: It can only provide 100W of power, which limited it to 17″ CRT displays and isn’t enough for 30″ LCD monitors, and the pins Apple used on the AGP connector to provide power were later designated for use with AGP 8x video cards, which is why pins 3 and 11 must be disabled on these cards before they will work in any AGP Power Mac G4 except the Sawtooth model. Part of the ADC legacy is that Apple used a single “ganged” cable for many of its displays, a cable that includes DVI, power, USB, and FireWire. There are also ADC-to-VGA adapters that allow users to connect a standard VGA monitor to an ADC port. ADC-to-DVI adapters (prices today start at about US$30) make it possible to use industry standard displays with non-ADC G4 Power Macs or use a second DVI display with video cards that included both ADC and DVI, as most of these video cards support dual monitors. The actual acceleration is achieved by translating Direct X commands from the guest OS to the OpenGL.
#Mac display adapter driver
Instead, Parallels Display Adapter driver (which is part of the Parallels Tools installation) interfaces with virtual hardware and provides 3D acceleration features.
#Mac display adapter plus
Third-party vendors were quick to realize an opportunity here, as four generations of G4 Power Macs had analog VGA plus ADC – but no DVI ports. Parallels Desktop has no access to the Macs devices physical graphics cards. The adapter connected to the DVI port and a USB port on the computer and uses a standard power cable to provide everything an ADC monitor needs.